1. Department of Pediatrics, Subdivision of Endocrinology, Erasmus University Medical Center-Sophia Children's Hospital , P.O. 2060, 3000 CB Rotterdam , The Netherlands
2. Department of Pediatrics, Subdivision of Endocrinology, Radboud University Medical Center , 6525 GA Nijmegen , The Netherlands
3. Department of Medical Informatics, Erasmus University Medical Center , 3015 CN Rotterdam , The Netherlands