1. J Hatch, PT, DPT, MS, was Physical Therapist, Department of Physical Therapy, Harvard Vanguard Medical Associates, West Roxbury, Mass, when this study was conducted.
2. KM Gill-Body, PT, DPT, MS, NCS, is Adjunct Clinical Associate Professor, Graduate Programs in Physical Therapy, MGH Institute of Health Professions, and Clinical Associate, Massachusetts General Hospital, Boston, Mass
3. LG Portney, PT, DPT, PhD, FAPTA, is Professor and Director, Graduate Programs in Physical Therapy, MGH Institute of Health Professions