Physician relationships with device industry representatives have not been previously assessed. This study explored interactions with device industry representatives among physicians who use implantable cardiovascular and orthopedic devices to identify whether conflict of interest (COI) is a concern and how it is managed.
A descriptive qualitative approach was used. Physicians who implant orthopedic and cardiovascular devices were identified in publicly available directories and web sites, and interviewed about their relationships with device industry representatives. Sampling was concurrent with data collection and analysis. Data were analyzed and discussed using constant comparative technique by all members of the research team.
Twenty-two physicians (10 cardiovascular, 12 orthopedic) were interviewed. Ten distinct representative roles were identified: purchasing, training, trouble-shooting, supplying devices, assisting with device assembly and insertion, supporting operating room staff, mitigating liability, conveying information about recalls, and providing direct and indirect financial support. Participants recognized the potential for COI but representatives were present for the majority of implantations. Participants revealed a tension between physicians and representatives that was characterized as “symbiotic”, but required physicians to be vigilant about COI and patient safety, particularly because representatives varied regarding disclosure of device defects. They described a concurrent tension between hospitals, whose policies and business practices were focused on cost-control, and physicians who were required to comply with those policies and use particular devices despite concerns about their safety and effectiveness.
Given the potential for COI and threats to patient safety, further research is needed to establish the clinical implications of the role of, and relationship with device industry representatives; and whether and how hospitals do and should govern interaction with representatives, or support their staff in this regard.
Citation: Gagliardi AR, Lehoux P, Ducey A, Easty A, Ross S, Bell C, et al. (2017) “We can’t get along without each other”: Qualitative interviews with physicians about device industry representatives, conflict of interest and patient safety. PLoS ONE 12(3): e0174934. https://doi.org/10.1371/journal.pone.0174934
Editor: Angel M. Foster, University of Ottawa, CANADA
Received: January 8, 2017; Accepted: March 18, 2017; Published: March 30, 2017
Copyright: © 2017 Gagliardi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Data Availability: All underlying data was submitted in the manuscript and in a supplemental file.
Funding: This research was funded by the Canadian Institutes of Health Research (cihr.ca), which had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Competing interests: The authors have declared that no competing interests exist.
Conflict of interest (COI) has been defined as “a set of circumstances that creates a risk that professional judgment or actions regarding a primary interest will be unduly influenced by a secondary interest” [1,2]. Physicians’ clinical decisions and practice patterns can be influenced by industry relationships [3,4]. The potential for COI may be widespread; according to public registers in the United States, financial relationships with industry were reported by 45% of otolaryngologists, 50% of orthopedic surgeons, 55% of plastic surgeons, 60% of urologists and 78% of neurologists .
Various approaches have been implemented by funders, professional societies and academic institutions to manage COI. Disclosure policies are the most commonly applied strategy to address COI [6–8]. However, research shows that guideline authors  and professional association meeting participants  failed to disclose payments from industry. Analysis of COI policies at American  and Canadian  universities and research institutions found that, while the majority had COI policies, they varied in criteria for what to disclose and how to manage COI. Limitation is another strategy for managing COI whereby organizations such as hospitals apply policies that prohibit employees from accepting industry incentives, or restrict visits from industry representatives . Despite the presence of such limitation policies, physicians who were interviewed said that they trusted and valued information from drug industry representatives, and felt that it benefited patients [14,15].
Physician relationships with device industry representatives have not been previously studied to identify whether COI is a concern or how it is managed. This is particularly relevant among physicians who use higher-risk cardiovascular or orthopedic devices that have been associated with adverse events [16,17], many of whom are involved in their development, or pre- or post-market evaluation [18,19]. Furthermore, interaction with representatives of the device industry differs from relations with drug industry representatives. Both types of representatives discuss and promote the uses and benefits of their products with physicians but, in contrast to drug representatives, device representatives are frequently present during instances of patient care when their products are being used. In part this occurs because hospitals seek to optimize the efficiency of supply management, standardize surgery and reduce costs through “just-in-time” delivery of medical devices by representatives . Thus, physician and institutional factors may result in considerable interaction between physicians and device representatives. To better understand this phenomenon, including whether physician relations with device representatives creates opportunities for COI and how it is managed, this study explored the nature of interactions with device industry representatives among physicians who use implantable cardiovascular and orthopedic devices to identify opportunities for COI that may influence patient safety.
In the absence of prior empirical research, qualitative methods are needed to provide a descriptive account that can serve as a point of reference for future research. A descriptive qualitative approach was used [21,22]. This qualitative approach does not test or generate theory. Instead, it is the most commonly used method to gather explicit information about views and experiences when seeking to understand the implications of phenomenon for health care practice or policy. Rigor and transferability were optimized using standard strategies and reporting criteria, for example, independent analysis of data by two or more investigators and inclusion of select quotes from a variety of participants (S1 Table) [23,24]. Ethics approval for this study was granted by the University Health Network Research Ethics Board. There was no relationship with participants, who provided written informed consent prior to scheduling and conducting interviews.
Sampling and recruitment
The sampling frame included Canadian physicians who use implantable cardiovascular or orthopedic devices because these are higher-risk devices that have been associated with adverse events that impact patient safety [16,17] and many individuals in these specialties are likely involved in device development or evaluation, which may lead to COI [18,19]. Physicians were identified in publicly available certification agency directories, and hospital or university web sites, and invited to participate by regular or electronic mail. They were purposively recruited to ensure representation by specialty (cardiac or vascular surgery, interventional cardiology, orthopedic surgery), region (Canadian provinces), setting (academic, community); and years in practice (self-reported early, mid or late career). A reminder was sent to non-respondents at two and four weeks from initial contact. Sampling in qualitative research is dependent on achieving thematic saturation, however, we initially aimed to interview at least ten physicians with experience in each of cardiovascular or orthopedic implantable devices who also varied by other sampling characteristics. Thematic saturation was determined through discussion among the research team on two occasions upon review of themes and exemplar quotes extracted from interview transcripts.
Telephone interviews were conducted and audio-recorded by the principal investigator between April 8 and September 28, 2015. Interviews averaged 31 minutes. Participants were asked: What is the nature of your relationship with device industry representatives? Subsequent prompts were dependent on participant responses but generally included: How often do you interact with the representative, what support do they provide, how do you manage COI, and what is the hospital policy on representatives and COI?
All members of the research team identified unique themes inductively using constant comparative technique . First, the principal investigator extracted all useable data from each transcript and applied preliminary codes that represented potential themes. This data were independently reviewed by all members of the research team on two separate occasions during data collection to assess the extent of thematic saturation, and their feedback was used to modify the coding scheme by adding, expanding, editing or merging thematic codes. Once all interviews were completed, the principal investigator again reviewed all transcripts to ensure that all relevant data were extracted. Data were again independently reviewed by the research team and discussed as a group to further refine the coding scheme. Data (quotes organized by thematic codes) were tabulated by theme and summarized (S2 Table). The summary was reviewed and discussed by the research team on a fourth occasion to interpret the data.
Twenty-two physicians who implanted cardiovascular (n = 10) and orthopedic devices (n = 12) were interviewed (Table 1) from among 27 who consented of the 561 that were invited to participate. These included 8, 10 and 4 early, mid and late career physicians, respectively, from five provinces. Views were similar between those who implanted cardiovascular and orthopedic devices.
Potential for COI recognized by physicians
A few participants adamantly said that they themselves maintained a distant relationship with representatives to avoid potential industry influence on their choice of devices.
I don’t like having the reps in the room generally. I want the people who are using the equipment to know it and learn it and there’s no encouragement to do that if the people are being spoon fed all the time. I know that there is a common kind of relationship and a sense of chumminess that happens in orthopedics and I want none of it. I have never taken any money from an equipment company directly. I don’t have consulting relationships with any of them. I just won’t do it (06OTM)
I purposely don’t keep a close relationship with them because I don’t want to be influenced by different products from their standpoint. Each company has devices that are best suited for specific reasons. One of the things that I pride myself on is being able to use the correct implants for the deformity. When you develop a relationship sometimes you get yourself caught in a hole where you don’t want to use other implants when sometimes you probably should (14OTE)
Representatives routinely present
In contrast, most participants described “symbiotic” relationships with representatives and said “we can’t get along without each other” (03OTL), referring to a variety of circumstances during which they interacted with device representatives. Interaction was frequent—participants said that representatives were present in the operating room for the majority of cases: “My rep is there 95% of the time or more” (12OCM) and “They would come to all the implantations” (13CTM). Furthermore, relationships with device representatives were said to be long-standing, suggesting that many representatives were well-known to physicians.
Some of the reps I’ve known for 20 years (20CTM). You see them in the hospital, in the hallway. I’ll actually stop and chat with them and I’ve had coffee or, if you’re at a meeting, dinner with them (20CTM)
These people have been veterans in the industry, they’ve worked for a number of different companies. I’ve seen them through residency and through my training (10OCE)
Physicians reliant on representatives
Representatives served multiple roles (Table 2). Information and support from representatives was considered an important factor in making individual or group decisions about which devices to purchase. Apart from colleagues, representatives were most frequently mentioned as a source of information about devices. Representatives supported training by either providing or linking physicians with training opportunities, and providing support during the learning curve period. Most notably, representatives were needed to ensure that devices, many of which are complex and comprised of a large number of components, were properly selected, assembled and implanted. By providing support to the operating room nurses, participants said that they could instead focus on the procedure. This was thought to reduce the duration of surgery, enhance patient safety and outcomes, and potentially mitigate liability for an adverse outcome. This was said to be even more important in community settings with few operating room staff.
Hospital policies may create opportunities for COI
Participants noted that their hospitals no longer purchased or stocked medical devices. Instead, representatives delivered devices to the operating room when needed. This represents a hospital policy that encourages physician-representative interaction.
We figure out the size or length or whatever it is we need and then he picks it off his selection. It’s like looking at a menu. They actually carry in the instruments to do the operation because the hospital doesn’t own them (07OTL)
Participants said that they were required to use devices from preferred vendors based on hospital or regional purchasing contracts, which further required physicians to interact with specific representatives. Participants said that this often resulted in disgruntled physicians, surgical complications, poor patient outcomes, and increased rather than reduced costs.
The group purchases that orthopedics has been involved in, things like cautery machines, staplers, have all been horrible and we’ve gone back to what we were using before. It’s just a disaster. They save the money and then it’s just horrible. It was like a mass protest. I think the group purchase was done without real consultation. Now it seems to be more participatory but it seems like we’re still purchasing things that most of the surgeons don’t like (10OCE)
We’ve had experience that if you force surgeons to change implants based on a contract that your complication rate goes up for a while. So it makes good business sense until you actually go and look at your revision costs over the next months to two years and then, all of a sudden, all of your cost-savings went into pain and suffering of patients and their subsequent care (08OTM)
In contrast to these policies that encouraged physician-representative interaction during instances of patient care, and preferential use of devices that were not considered ideal for patients or physicians, one participant referred to a hospital-level policy or practice of limiting interaction with representatives.
Physician responsibility to manage COI and protect patient safety
Given the indispensable role of representatives, participants said it was their own responsibility to manage potential COI.
The main thing is to disassociate any sense of obligation toward the rep. I don’t take any money from them and, if they all have equal access, then there’s no way you can be biased. So I have a good relationship with them. But it’s definitely not at arms-length because when I have issues I want to be able to approach them and complain (20CTM)
Participants said that representatives varied regarding disclosure of device warnings. In such cases physicians verified information or changed products to ensure patient safety.
There are a number of other companies we use where the representation falls well below the standard and it’s well-known. In relationships like that your guard is up, you’re always double-checking everything, you’re always verifying with other colleagues that have used that system to make sure that you’re doing the best you can for the patient (10OCE)
If we ever got into a situation where I felt that they were putting patients at risk I would just go crazy on them. For example, there was a problem with a type of wire that we use in coronaries where the manufacturer knew there was a problem and left them on the shelves. So I basically stopped using any of their stuff (21CTM)
Physicians who use implantable devices recognized that relationships with device industry representatives created the potential for COI to influence decision-making about devices, and for patient safety to be compromised if representatives did not share information about device warnings. However, they assumed responsibility for managing such relationships because representatives function as indispensable members of the operating room team with specialized and proprietary information that may be essential to achieving optimal patient outcomes. To manage COI, physicians said they avoided industry representatives, avoided taking money from them, consulted with colleagues for advice about devices, or stopped using a particular device if they had concerns about it. Hospital policies and business practices may encourage COI by facilitating representative presence in the operating room and, through purchasing contracts, mandating the use of particular devices that, in the view of physicians, were not safe or effective. Overall this research revealed a tension between physicians and device representatives that was characterized as “symbiotic”, but required physicians to be vigilant about COI and patient safety. There was a distinct concurrent tension between hospitals, whose policies and business practice were focused on cost-control, and physicians who were required to comply with those policies and practices, and use particular devices despite concerns about their safety and effectiveness.
Strengths of this study included the use of rigorous qualitative methods to capture detailed information about the physician-device representative relationship. Sampling was purposive to capture a variety of perspectives from individuals with differing characteristics, and achieved thematic saturation which signals that recruitment was sufficient to thoroughly identify relevant themes. However, several limitations should be mentioned. The study involved a small number of participants, and they were sampled from Canadian hospitals. Therefore the findings may not be transferrable to other settings, and should be confirmed through investigation of these themes in other settings.
Few comparable studies were identified, and largely focused on drug industry gifts or research funding. American physicians who took part in focus groups  and a survey  considered interactions with, and gifts and funding from drug representatives as positive and beneficial, disagreed that such relationships affected physician behaviour, and rationalized that they remained impartial. Similarly, physicians in this study said that device representatives offered many beneficial services and they could manage COI. Studies of academic institutions in the United States  and Canada  found that policies concerning COI were absent in hospitals and, as a result, the onus was on individual physicians to self-regulate. This also appeared to be true in our study. While there are similarities between representatives of drug companies and device companies there are also differences–drugs are not stocked in a just-in-time manner, may be much simpler to use, do not require hands-on instruction, and may not be subject to the same types of contractual restrictions compared with devices. Future research should explore whether these differences lead to different types of physician-industry interaction with differing implications for COI. Given that physicians may not have the capacity to objectively judge their own performance , ongoing research is warranted to assess the impact of behavioral interventions that influence cognitive dissonance, or awareness of actual versus desirable behavior, such as audit and feedback  on views about COI and relationships with industry representatives.
Participants in our study noted the variable reliability of representatives, which raises questions about the characteristics of such individuals. A study by Mueller et al. involving focus groups with 17 American cardiovascular device industry representatives reported that they had former experience in nursing, pharmacy, engineering, business, veterinary medicine and administration . Notably, the same study revealed that device representatives experienced role conflicts and moral distress regarding their activities in the clinical setting and customer service obligations . Representatives said that physicians and nurses lacked knowledge about devices, and asked them for assistance beyond their expected duties including making clinical decisions about how devices should be programmed and managed, deactivating devices, and informing patients and family about the deactivation process and outcomes. They said that their customer service responsibilities had grown tremendously in recent years, and referred to this as an unpaid service to remedy staffing shortages in the clinical setting. They were reluctant to decline clinician requests, fearing that this would affect their relationship with clinicians and impact their ability to sell their companies’ products. The study by Mueller et al. suggests the presence of a third tension between clinicians and device representatives that further contributes to the potential for COI. Ongoing research involving device representatives should further investigate the challenges they experience when interacting with physicians that may compromise patient safety. Such research could also involve nurses who may be witness to industry representative-physician interactions in the operating room.
These findings are novel because there is little research on the implications of representative presence in the operating room. In response to concern about their role and influence, some hospitals have instituted policies specifying that representatives must assist medical staff only verbally, acquire a distinct identification badge on each visit and, prior to their first visit, provide documentation of competency in the specific device, training in infection control, insurance certificate, proof of annual tuberculosis test and signed confidentiality agreement . Nursing and surgeon professional societies have issued similar statements regarding the credentialing and appropriate role of representatives [30,31]. A survey of senior nurses in charge of 79 gynecology operating theatres in the United Kingdom found that 82% had no guidelines for representative presence in the operating room, and 42% obtained patient consent for visits . In surveys of arthroplasty patients in Canada and the United States, most respondents reported that their physician had not mentioned COI in advance of surgery [33–36]. Those patients trusted physicians to self-regulate, and believed that oversight should be provided by professional associations. Current professional society standards for COI focus on how their own organization manages COI, for example, funding of continuing education and annual meetings, rather than how they can help individual members to mitigate COI in their daily interactions with industry representatives [37–39].
In conclusion, this exploratory study identified tensions between physicians, hospitals and device industry representatives that may contribute to COI. Physicians may be reliant on industry representatives for their knowledge and skill, and hospitals, by employing purchasing agreements and just-in-time operating room delivery of devices, promote physician reliance on device industry representatives. Further research is needed to identify the clinical implications of the characteristics and role of, and relationship with medical device industry representatives from the physician, nurse and representative perspective; how that relationship and its implications differ from physician interaction with drug industry representatives; whether and how hospitals do and should govern interaction with medical device representatives; and explore the views of leadership from professional societies on how they could help their members manage COI, and the effectiveness of behavioral interventions that influence physician views about COI.
S1 Table. COREQ checklist for reporting qualitative research.
The authors thank Julie Takata for assistance in organizing meetings for this study.
- Conceptualization: ARG PL AD AE SR CB PT DRU.
- Data curation: ARG.
- Formal analysis: ARG PL AD AE SR CB PT DRU.
- Funding acquisition: ARG DRU.
- Investigation: ARG.
- Methodology: ARG PL AD AE SR CB PT DRU.
- Project administration: ARG.
- Resources: ARG DRU.
- Supervision: ARG DRU.
- Validation: ARG PL AD AE SR CB PT DRU.
- Visualization: ARG PL AD AE SR CB PT DRU.
- Writing – original draft: ARG PL AD AE SR CB PT DRU.
- Writing – review & editing: ARG PL AD AE SR CB PT DRU.
- 1. Kesselheim AS, Maisel WH. Managing financial and nonfinancial conflicts of interest in healthcare delivery. Am J Therapeutics. 2010;17:440–443.
- 2. Institute of Medicine. Conflict of interest in medical research, education and practice. Washington DC: The National Academics Press, 2009.
- 3. Lexchin J. Interactions between physicians and the pharmaceutical industry: what does the literature say? CMAJ. 1993;149:1401–1407. pmid:8221424
- 4. Robertson C, Rose S, Keselheim AS. Effect of financial relationships on the behaviors of health care professionals. J Law Med Ethics. 2012;40:452–466. pmid:23061573
- 5. Cvetanovich GL, Chalmers PN, Bach BR. Industry financial relationships in orthopedic surgery: Analysis of the Sunshine Act Open Payments Database and comparison with other surgical subspecialties. J Bone Joint Surg. 2015;97:1288–1295. pmid:26246264
- 6. Greenberg RD. Conflicts of interest: can a physician serve two masters? Clin Dermatol. 2012;30:160–173. pmid:22330659
- 7. Rothman DJ, McDonald WJ, Berkowitz CD, Chimonas SC, DeAngelis CD, Hale RW, et al. Professional medical associations and their relationship with industry. A proposal for controlling conflict of interest. JAMA. 2009;301:1367–1372. pmid:19336712
- 8. Cosgrove L, Bursztajn HJ, Krimsky S, Anaya M, Walker J. Conflicts of interest and disclosure in the American Psychiatric Association’s clinical practice guidelines. Psychother Psychosom. 2009;78:228–232. pmid:19401623
- 9. Alhamoud HA, Dudum R, Young HA, Choi BG. Author self-disclosure compared with pharmaceutical company reporting of physician payments. Am J Med. 2015;129:59–63. pmid:26169886
- 10. Buerba RA, Fu MC, Grauer JN. Discrepancies in spine surgeon conflict of interest disclosures between a national meeting and physician payment listings on device manufacturer web sites. Spine J. 2013;13:1780–1788. pmid:23830826
- 11. Van McCrary S, Anderson CB, Jakovljevic J, Khan T, McCullough LB, Wray NP, et al. A national survey of policies on disclosure of conflicts of interest in biomedical research. NEJM. 2000;343:1621–1626. pmid:11096171
- 12. Lexchin J, Sekeres M, Gold J, Ferris LE, Kalkar SR, Wu W, et al. National evaluation of policies on individual financial conflicts of interest in Canadian academic health science centers. J Gen Intern Med 2007;23:1896–1903.
- 13. Kirkpatrick JN, Kadakia MB, Vargas A. Management of conflicts of interest in cardiovascular medicine. Progress Cardiovasc Dis. 2012;55:258–265.
- 14. Chimonas S, Brennan TA, Rothman DJ. Physicians and drug representatives: Exploring the dynamics of the relationship. J Gen Intern Med. 2007;22:184–190. pmid:17356984
- 15. Fischer MA, Keough ME, Baril JL, Saccoccio L, Mazor KM, Ladd E, et al. Prescribers and pharmaceutical representatives: why are we still meeting? J Gen Intern Med. 2009;24:795–801. pmid:19424764
- 16. Pabinger C, Berghold A, Boehler N, Labek G. Revision rates after knee replacement. Cumulative results from worldwide clinical studies versus joint registers. Osteoarthritis Cartilage. 2013;21:263–268. pmid:23220555
- 17. Zhang S, Kriza C, Schaller S, Kolominsky-Rabas PL. Recalls of cardiac implants in the last decade: what lessons can we learn? PLoS One. 2015;10:e0125987. pmid:25962074
- 18. Van Haute A. Managing perceived conflicts of interest while ensuring the continued innovation of medical technology. J Vasc Surg. 2011;54(3 Suppl):31–33.
- 19. Donovan A, Kaplan AV. Navigating conflicts of interest for the medical device entrepreneur. Progress Cardiovasc Dis. 2012;55:316–320.
- 20. Park KW, Dickerson C. Can efficient supply management in the operating room save millions? Curr Opin Anaesthesiol. 2009;22:242–248. pmid:19295431
- 21. Auerbach CF, Silverstein LB. Qualitative data: an introduction to coding and analysis. New York: New York University Press, 2003.
- 22. Sandelowski M. Whatever happened to qualitative description? Res Nurs Health. 2000; 23:334–340. pmid:10940958
- 23. Barbour RS. Checklists for improving rigour in qualitative research: a case of the tail wagging the dog? BMJ. 2011; 322:1115–1117.
- 24. Tong A, Sainsbury P, Craig J. Consolidated criteria for reporting qualitative research (COREQ): a 32-item checklist for interviews and focus groups. Int J Qual Health Care. 2007;19:349–357. pmid:17872937
- 25. Korenstein D, Keyhani S, Ross JS. Physician attitudes toward industry. Arch Surg. 2010;145:570–577. pmid:20566978
- 26. Davis DA, Mazmanian PE, Fordis M, Van Harrison R, Thorpe KE, Perrier L. Accuracy of physician self-assessment compared with observed measures of competence: a systematic review. JAMA. 2006;296:1094–1102. pmid:16954489
- 27. Ivers N, Jamtvedt G, Flottorp S, Young JM, Odgaard-Jensen J, French SD, O'Brien MA, Johansen M, Grimshaw J, Oxman AD. Audit and feedback: effects on professional practice and healthcare outcomes. Cochrane Database Syst Rev. 2012;6:CD000259.
- 28. Mueller PS, Ottenberg AL, Hayes DL, Koenig BA. “I felt like the angel of death”: role conflicts and moral distress among allied health professionals employed by the US cardiovascular implantable electronic device industry. J Interv Card Electrophysiol. 2011;32:253–261. pmid:21861198
- 29. Gutman ME. Collaborating to manage vendor interactions and protect quality of care in the OR. ASHRM J. 2005;25:13–16.
- 30. American College of Surgeons Committee on Perioperative Care. Revised statement on health care industry representatives in the operating room. Bull Am Coll Surg. 2005;90:27–28.
- 31. Plonien C, Williams M. Vendor presence in the OR. AORN J. 2014;100:81–86. pmid:24973187
- 32. Sillender M. Can patients be sure they are fully informed when representatives of surgical equipment manufacturers attend their operations? J Med Ethics. 2006;32:395–397. pmid:16816038
- 33. Lieberman JR, Pensak MJ, Kelleher MS, Leger RR, Polkowski GG. Disclosure of financial conflicts of interest. An evaluation of orthopedic surgery patients’ understanding. Clin Orthop Relat Res. 2013;471:742–747.
- 34. Camp MW, Mattingly DA, Gross AE, Nousiainen MT, Alman BA, McKneally MF. Patients’ views on surgeons’ financial conflicts of interest. J Bone Joint Surg Am. 2013;95:1–8.
- 35. Camp MW, Gross AE, McKneally MF. Patient views on financial relationships between surgeons and surgical device manufacturers. Can J Surg. 2015;58:323–329. pmid:26384147
- 36. Yi PH, Cross MB, Johnson SR, Rasinski KA, Nunley RM, Della Valle CJ. Are financial conflicts of interest for the surgeon a source of concern for the patient? J Arthroplasty. 2015;30(9 Suppl):21–33. pmid:26122110
- 37. Schofferman JA, Eskay-Auerbach ML, Sawyer LS, Herring SA, Arnold PM, Muehlbauer EJ. Conflict of interest and professional medical associations: the North American Spine Society experience. Spine J. 2013;13:974–979. pmid:23092717
- 38. Minter RM, Angelos P, Coimbra R, Dale P, de Vera ME, Hardacre J, et al. Ethical management of conflict of interest: Proposed standards for academic surgical societies. J Am Coll Surg. 2011;213:677–682. pmid:21880513
- 39. Camilleri M, Parke DW. Conflict of interest and professional organizations: Considerations and recommendations. Acad Med. 2010;85:85–91. pmid:20042830