1. A.W. Andrews, PT, EdD, NCS, Department of Physical Therapy Education, Elon University, Campus Box 2085, Elon, NC 27244 (USA).
2. D. Li, MS, The Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
3. J.K. Freburger, PT, PhD, The Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill.