1. Department of Physical Therapy, College of Osteopathic Medicine, William Carey University, Hattiesburg, MS 39401, USA
2. Spinal Cord Injury and Disorders Center, Hunter Holmes McGuire VA Medical Center, Richmond, VA 23249, USA
3. College of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
4. Department of Physical Therapy, Arcadia University, Glenside, PA 19038, USA
5. International FES Centre®, Swiss Paraplegic Center, CH-6207 Nottwil, Switzerland