1. Division of Pediatric Endocrinology, Diabetology, and Metabolism and Department of Clinical Research (V.P., M.C.M., A.E., C.E.F., P.E.M.), University Children's Hospital, CH-3010 Bern, Switzerland
2. Department of Pediatric Endocrinology (D.I.I., G.B.), University Children's Hospital Tübingen, D-72076 Tübingen, Germany