1. A Shumway-Cook, PT, PhD, is Associate Professor, Department of Rehabilitation Medicine, University of Washington, Box 356490, Seattle, WA 98195 (USA)
2. MA Ciol, PhD, is Research Assistant Professor, Department of Rehabilitation Medicine, University of Washington
3. W Gruber, MD, was Medical Director, SAGE Program, Northwest Hospital, Seattle, Wash, at the time of the study
4. CA Robinson, PT, MS, is Clinical Instructor, Department of Rehabilitation Medicine, University of Washington