1. Pediatric Endocrinology and Diabetology, Children’s Hospital, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
2. Center for Rare Diseases Essen, EZSE, University Hospital Essen, Essen, Germany
3. Department of Endocrinology, Diabetes and Metabolism, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
4. Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, University of Lübeck, Lübeck, Germany
5. Institute for Human Genetics, University of Duisburg-Essen, Essen, Germany