1. Department of Physical Therapy, University of Toronto; Department of Rehabilitation, The Hospital for Sick Children and Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, Toronto, ON, Canada
2. Division of Plastic and Reconstructive Surgery, The Hospital for Sick Children, Toronto, ON, Canada
3. Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health and Department of Physical Therapy, University of Toronto, Toronto, ON, Canada
4. Schroeder Arthritis Institute, Krembil Research Institute, University Health Network, and Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, and Department of Surgery, University of Toronto, Toronto, ON, Canada
5. Department of Physical Therapy, University of Toronto, Toronto, ON, Canada
6. UCL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital, London, UK
7. Lawrence S. Bloomberg Faculty of Nursing, University of Toronto and Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, Toronto, ON, Canada