1. Division of Pediatric Nephrology (O.M.), University Hospital for Children and Adolescents, D-69120 Heidelberg, Germany
2. Pfizer Endocrine Care (A.L.), KIGS/KIMS/ACROSTUDY, S-19190 Stockholm, Sweden
3. University Hospital for Children and Adolescents (R.N., D.H.), D-18057 Rostock, Germany
4. Dutch Growth Research Foundation (A.H.-K.), 3016 AH Rotterdam, The Netherlands
5. Department of Pediatrics and Endocrinology (M.B.R.), University Children’s Hospital, D-72076 Tübingen, Germany