1. DJ Bartlett, PT, PhD, is Assistant Professor, School of Physical Therapy, Faculty of Health Sciences, 1588 Elborn College, The University of Western Ontario, London, Ontario, Canada N6G 1H1, and Associate Member, CanChild, Centre for Childhood Disability Research, McMaster University, Hamilton, Ontario, Canada.
2. RJ Palisano, PT, ScD, is Professor, Programs in Rehabilitation Sciences, MCP Hahnemann University, Philadelphia, Pa, and Co-Investigator, CanChild, Centre for Childhood Disability Research, McMaster University