1. Submitted during third year, Temple University School of Podiatric Medicine, Philadelphia, PA.
2. Associate Professor, Department of Surgery, Temple University School of Podiatric Medicine, Philadelphia, PA.
3. Director, Gait Study Center, and Associate Professor, Department of Orthopedics and Medicine, Temple University School of Podiatric Medicine, Philadelphia, PA; Visiting Assistant Research Professor, Biomedical Engineering and Science Institute, Drexel University, Philadelphia, PA. Mailing address: Temple University School of Podiatric Medicine, Eighth at Race St, Philadelphia, PA 19107.