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