

6 Section of Adolescent Medicine, Department of Pediatrics, Alberta Children's Hospital, University of Calgary, Calgary, Alberta, Canada.5 Division of Adolescent Medicine, Department of Pediatrics, McMaster's Children's Hospital, McMaster University, Hamilton, Ontario, Canada.4 Section of Adolescent Medicine, Department of Pediatrics, Sainte Justine Hospital, Université de Montréal, Montreal, Quebec, Canada.3 Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada.2 Division of Pediatric Emergency Medicine, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada.1 Division of Adolescent Medicine, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, Quebec, Canada.
