1. Department of Pediatric Endocrinology, Beatrix Children's Hospital University Medical Center Groningen, University of Groningen Groningen the Netherlands
2. Diabeter Center for Pediatric and Adolescent Diabetes Care and Research Groningen the Netherlands
3. Department of Pediatrics Rijnstate Hospital Arnhem the Netherlands
4. Department of Pediatric Nephrology, Beatrix Children's Hospital University Medical Center Groningen, University of Groningen Groningen the Netherlands
5. Department of Internal Medicine, Division of Nephrology University Medical Center Groningen, University of Groningen Groningen the Netherlands
6. Department of Internal Medicine, Division of Endocrinology University Medical Center Groningen, University of Groningen Groningen the Netherlands