1. SP Gombatto, PT, MS, is a doctoral candidate in the Program in Physical Therapy, Washington University School of Medicine, Campus Box #8502, 4444 Forest Park Blvd, St Louis, MO 63110 (USA)
2. DR Collins, PhD, is Independent Consultant to the Musculoskeletal Analysis Laboratory, Program in Physical Therapy, Washington University School of Medicine
3. SA Sahrmann, PT, PhD, FAPTA, is Professor of Physical Therapy/Neurology/Cell Biology & Physiology, Program in Physical Therapy, Washington University School of Medicine
4. JR Engsberg, PhD, is Associate Professor, Department of Physical Therapy, Doisy College of Health Sciences, Saint Louis University, St Louis, Mo
5. LR Van Dillen, PT, PhD, is Assistant Professor, Program in Physical Therapy, Washington University School of Medicine