1. Division of Pediatric Endocrinology and Diabetology University Medical Center Schleswig‐Holstein Lübeck Germany
2. Institute for Social Medicine and Epidemiology, University of Lübeck Lübeck Germany
3. Hannover Medical School Medical Psychology Hannover Germany
4. Department of Pediatrics Kiel University Medical Centre Schleswig‐Holstein Kiel Germany
5. Department of Pediatrics General Hospital Kiel Kiel Germany