1. Research Center of Sainte-Justine Hospital (I.V., H.S., R.A.-K., J.D.), Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada H3T 1C5
2. Institute of Interdisciplinary Research in Molecular Human Biology (I.V.), Université Libre de Bruxelles, B-1070 Brussels, Belgium
3. Department of Biochemistry (R.A.-K., J.D.), University of Montreal, Montreal, Canada H3C 3J7
4. Endocrinology and Diabetes Unit (J.-P.C.), Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, Canada V6H 3V4