1. C.A. Robinson, PT, PhD, Division of Physical Therapy, Department of Rehabilitation Medicine, University of Washington, BB913 Box 356490, Seattle, WA 98195 (USA).
2. P.N. Matsuda, PT, PhD, DPT, Division of Physical Therapy, Department of Rehabilitation Medicine, University of Washington, Seattle, Washington.
3. M.A. Ciol, PhD, Division of Physical Therapy, Department of Rehabilitation Medicine, University of Washington.
4. A. Shumway-Cook, PT, PhD, Division of Physical Therapy, Department of Rehabilitation Medicine, University of Washington.