1. Department of Medical Psychology; Radboud university medical center; 6500 HE Nijmegen The Netherlands
2. Children's Diabetes Center Nijmegen; 6500 GS Nijmegen The Netherlands
3. Department of Pediatrics; Radboud university medical center; 6500 HE Nijmegen The Netherlands
4. Scientific Institute for Quality of Healthcare, Radboud university medical center; 6500 HE Nijmegen The Netherlands