1. WC Miller, PhD, MSC(OT), is Assistant Professor, Faculty of Medicine, School of Rehabilitation Sciences, University of British Columbia, T325 Third Floor, Koerner Pavilion, 2211 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2B5.
2. M Speechley, PhD, is Associate Professor, Faculty of Medicine and Dentistry, Department of Epidemiology and Biostatistics, University of Western Ontario, London, Ontario, Canada
3. AB Deathe, MD (FRCPC), is Associate Professor, Department of Physical Medicine and Rehabilitation, University of Western Ontario, and Medical Director, Amputee Program, St Joseph's Health Care London, London, Ontario, Canada