1. J. Chevan, PT, PhD, MPH, OCS, Department of Physical Therapy, Springfield College, 263 Alden St, Springfield, MA 01109 (USA).
2. D.L. Riddle, PT, PhD, FAPTA, Department of Physical Therapy, Virginia Commonwealth University, Richmond, Virginia.
3. S.D. Reed, PhD, Duke Clinical Research Institute, Duke University School of Medicine, Durham, North Carolina.