1. School of Rehabilitation Science and
2. Hamilton Health Sciences, McMaster Children's Hospital, Hamilton, Ontario, Canada; and
3. CanChild Centre for Childhood Disability Research, McMaster University, Hamilton, Ontario, Canada;
4. Departments of Clinical Epidemiology and Biostatistics,
5. Pediatrics,
6. Surgery, and
7. Private Practice, Paris, Ontario, Canada
8. Medicine, Faculty of Health Sciences, and