1. D.U. Jette, PT, DSc, is Professor and Chair, Department of Rehabilitation and Movement Science, University of Vermont, Burlington, Vermont.
2. M.C. Bourgeois, PT, DPT, CCS, is Clinical Assistant Professor, Department of Physical Therapy, MGH Institute of Health Professions, Boston, Massachusetts.
3. R. Buchbinder, PhD, is Professor, Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia.