1. Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California
2. Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California
3. Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, 1540 East Alcazar St, CHP-155, Los Angeles, CA (USA)