1. K. Kulig, PT, PhD, FAPTA, FAAOMPT(Hon), Musculoskeletal Biomechanics Research Laboratory, Division of Biokinesiology and Physical Therapy, Herman Ostrow School of Dentistry, and Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 E Alcazar St, CHP-155, Los Angeles, CA 90089 (USA).