1. Department of Medical Education, Geisel School of Medicine at Dartmouth, Hanover, NH, USA;
2. Department of Physical Therapy, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA, USA;
3. Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA;
4. Department of Engineering Sciences, Thayer School of Engineering, Dartmouth College, Hanover, NH, USA