1. Department of Pediatrics II, Pediatric Endocrinology and Diabetes; University Children's Hospital Essen; Essen; Germany
2. Institute of Epidemiology and Medical Biometry; University of Ulm; Ulm; Germany
3. Division of Endocrinology & Diabetes, Medical Department I; University of Frankfurt; Frankfurt / Main; Germany
4. Department of Pediatrics and Adolescence Medicine, Division of Endocrinology and Diabetes; Medical University Graz; Graz; Austria
5. Department of Pediatric Endocrinology and Diabetes; University of Bonn; Bonn; Germany
6. Division of Endocrinology & Diabetes, Medical Department I; University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg; Germany
7. Division of Endocrinology & Diabetology, Department of Internal Medicine II; University Hospital of Freiburg; Freiburg; Germany
8. Division of Pediatric Endocrinology & Diabetes; University of Hanover; Hannover; Germany