1. Department of Physical Therapy and College of Osteopathic Medicine, William Carey University, Hattiesburg, Mississippi, USA
2. Clinical Exercise and Rehabilitation Unit, Discipline of Exercise and Sports Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, Australia
3. School of Population Health, University of Mississippi Medical Center, Jackson, Mississippi, USA
4. Spinal Cord Injury & Disorders Center, Hunter Holmes McGuire VAMC and Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, Virginia, USA