1. Department of Endocrinology (C.F.V., S.H.), Sydney Children's Hospital, Randwick, and School of Women's and Children's Health, University of New South Wales, Sydney NSW 2031, Australia
2. Division of Diabetology and Endocrinology (D.K.), University Children's Hospital, CH-8032 Zurich, Switzerland
3. Division of Pediatric Endocrinology (M.C., J.H.), The Hospital for Sick Children, Toronto, Ontario, Canada M5G 1X8
4. Departments of Medicine (C.D.C., A.M.D., T.M., R.E.W., S.R.), Chicago, Illinois 60637
5. Pediatrics (R.E.W., S.R.), Chicago, Illinois 60637
6. the Committee on Genetics (S.R.), The University of Chicago, Chicago, Illinois 60637