About the Authors

Katherine A. Boyer

kboyer@kin.umass.edu

Affiliation Departments of Kinesiology and Mechanical and Industrial Engineering, University of Massachusetts-Amherst, Amherst MA, United States of America

Thomas P. Andriacchi

Affiliations Departments of Mechanical Engineering and Orthopedic Surgery, Stanford University, Stanford, CA United States of America, Palo Alto Veterans Affairs Health Care System, Palo Alto, CA, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: KB TA. Data curation: KB. Formal analysis: KB. Funding acquisition: TA. Investigation: KB. Methodology: KB TA. Project administration: KB TA. Resources: TA. Software: KB TA. Supervision: KB TA. Visualization: KB. Writing – original draft: KB. Writing – review & editing: KB TA.