1University of Calgary, Section of Orthopaedic Surgery, Health Sciences Centre, Calgary, AB, Canada
2Human Motion Lab, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
3Department of Orthopedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
4Department of Biomechanics, Hospital for Special Surgery, New York, NY, USA
5Hospital for Special Surgery, New York, NY, USA
6Department of Orthopedic Surgery, Foot and Ankle, Hospital for Special Surgery, New York, NY, USA