1. KE Personius, PT, is a doctoral student in the Physiological Sciences Program, University of Arizona, Tucson, AZ 85721. He was Staff Physical Therapist, Department of Neurology, University of Rochester, Rochester, NY 14642, when this study was conducted.
2. S Pandya, PT, is Assistant Professor, Department of Neurology, University of Rochester, and Department of Physical Therapy, Ithaca College, Rochester Campus, 300 E River Rd, Rochester, NY 14623 (USA).
3. WM King, PT, is Therapy Supervisor, Muscular Dystrophy Clinic, Department of Neurology, Ohio State University, Columbus, OH 43210.
4. R Tawil, MD, is Assistant Professor, Department of Neurology, University of Rochester.
5. MP McDermott, PhD, is Assistant Professor, Departments of Biostatistics and Neurology, University of Rochester.