1. Division of Rheumatology, Department of Medicine , McMaster University , Hamilton , Canada
2. Department of Pediatrics , McMaster University , Hamilton , Canada
3. McMaster University , Hamilton , Canada
4. Division of Rheumatology , Department of Pediatrics , McMaster University , Hamilton , Canada
5. Department of Pediatrics and Director of CanChild Centre for Childhood Disability Research, Division of Physical Medicine and Rehabilitation, McMaster University , Hamilton , Canada