About the Authors

Colin John Crooks

colin.crooks@nottingham.ac.uk

Affiliations Division of Epidemiology and Public Health, The University of Nottingham, Nottingham City Hospital, Nottingham, United Kingdom, Nottingham Digestive Diseases Centre, National Institute for Health Research Biomedical Research Unit, Queen's Medical Centre, Nottingham University Hospitals National Health Service Trust, Nottingham, United Kingdom

Timothy Richard Card

Affiliations Division of Epidemiology and Public Health, The University of Nottingham, Nottingham City Hospital, Nottingham, United Kingdom, Nottingham Digestive Diseases Centre, National Institute for Health Research Biomedical Research Unit, Queen's Medical Centre, Nottingham University Hospitals National Health Service Trust, Nottingham, United Kingdom

Joe West

Affiliations Division of Epidemiology and Public Health, The University of Nottingham, Nottingham City Hospital, Nottingham, United Kingdom, Nottingham Digestive Diseases Centre, National Institute for Health Research Biomedical Research Unit, Queen's Medical Centre, Nottingham University Hospitals National Health Service Trust, Nottingham, United Kingdom

Competing Interests

TRC's wife is an employee of Takeda, and was previously employed by Astra Zeneca. The authors declare no other competing interests.

Author Contributions

Conceived and designed the experiments: CJC TRC JW. Analyzed the data: CJC. Contributed reagents/materials/analysis tools: CJC TRC JW. Wrote the first draft of the manuscript: CJC. Contributed to the writing of the manuscript: CJC TRC JW. ICMJE criteria for authorship read and met: CJC TRC JW. Agree with manuscript results and conclusions: CJC TRC JW.