1. Center for Clinical Epidemiology, Lady Davis Institute, Jewish General Hospital, Montreal, Quebec, Canada;
2. Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Quebec, Canada;
3. Division of Endocrinology, Jewish General Hospital and McGill University, Montreal, Quebec, Canada;
4. Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine and University of Montreal, Montreal, Quebec, Canada; and
5. Centre Hospitalier Universitaire Sainte-Justine Research Center, Montreal, Quebec, Canada
6. Departments of Pediatrics,
7. Medicine, and