1. Diabetes Centre, Isala; Zwolle The Netherlands
2. Princess Amalia Children's Clinic, Isala; Zwolle The Netherlands
3. Vektis; Zeist The Netherlands
4. Department of general practice; University Medical Center Groningen and University of Groningen; Groningen The Netherlands
5. UMCG Postgraduate School of Medicine; University Medical Center and University of Groningen; Groningen The Netherlands
6. Diabeter, Center for Pediatric and Adolescent Diabetes Care and research; Rotterdam The Netherlands
7. Juliana Children's Hospital/Haga Teaching Hospital; The Hague The Netherlands
8. Department of internal medicine; University Medical Center Groningen and University of Groningen; Groningen The Netherlands
9. Langerhans Medical Research Group; Zwolle The Netherlands