1. N.T. White, PT, DPT, OCS, Clinical Practice and Research Department, American Physical Therapy Association, 1111 N Fairfax St, Alexandria, VA 22314 (USA).
2. A. Delitto, PT, PhD, FAPTA, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania.
3. T.J. Manal, PT, PhD, Physical Therapy Department, University of Delaware, Newark, Delaware.
4. S. Miller, BS, Clinical Practice and Research Department, American Physical Therapy Association.