Institution: | 1. Mechanical Engineering, Stanford University, Stanford, CA, USA;2. Norwegian School of Sport Sciences, P.O. Box 4014 Ulleval Stadion, 0806 Oslo, Norway;3. Bone and Joint Center, VA Palo Alto Health Care System, Palo Alto, CA, USA;4. School of Medicine, Stanford University, Stanford, CA, USA;5. Department of Kinesiology, University of Massachusetts-Amherst, Amherst, MA, USA |