1. Department of Biochemistry (R.A.-K., J.D.), University of Montréal, Montréal, Canada H3C 3J7;
2. Endocrinology Service and Research Center (R.A.-K., F.M., C.D., G.V.V., J.D.), Centre Hospitalier Universitaire Sainte Justine, Department of Pediatrics, University of Montréal, Montréal, Canada H3T 1C5;
3. Endocrinology and Diabetes Unit (J.-P.C.), Department of Pediatrics, British Columbia Children's Hospital, University of British Columbia, Vancouver, Canada V6H 3V4