1. Experimental and Clinical Endocrinology, University Hospital of Schleswig-Holstein, Campus Luebeck, Luebeck, Germany
2. Department of Endocrinology, Christie Hospital NHS Foundation Trust, Manchester, United Kingdom
3. Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
4. Division of Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, Campus Luebeck, Luebeck, Germany
5. Department of Pediatrics and Adolescent Medicine, Division of Pediatric Endocrinology and Diabetes, Ulm University Medical Center, Ulm, Germany