1. Direction de santé publique de Montréal-Centre, Montreal, Quebec, Canada
2. Department of Epidemiology and Biostatistics, McGill University, Montreal, Quebec, Canada
3. Division of Preventive Medicine, McGill University Health Center, Montreal, Quebec, Canada
4. Department of Nutrition, University of Montreal, Montreal, Quebec, Canada
5. Research Center, Ste-Justine Hospital, Montreal, Quebec, Canada
6. Department of Clinical Biochemistry, Ste-Justine Hospital and University of Montreal, Montreal, Quebec, Canada
7. Division of Medical Genetics, Ste-Justine Hospital, Montreal, Quebec, Canada
8. Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada