1. McGill Scoliosis and Spine Group; Montreal Québec Canada
2. Shriners Hospitals for Children-Canada; Montreal Québec Canada
3. McGill University Health Centre; Montreal Québec Canada
4. Alan Edwards Centre for Research on Pain; Montreal Québec Canada
5. Department of Anesthesia; McGill University; Montreal Québec Canada
6. Division of Pediatric Orthopaedics; McGill University; Montreal Québec Canada
7. Department of Surgery; Université de Sherbrooke; Sherbrooke Québec Canada