1. The Generation R Study Group; Erasmus Medical Center; Rotterdam the Netherlands
2. Department of Epidemiology; Erasmus Medical Center; Rotterdam the Netherlands
3. Department of Paediatrics; Erasmus Medical Center-Sophia Children's Hospital; Rotterdam the Netherlands
4. Department of Internal Medicine; Erasmus Medical Center; Rotterdam the Netherlands
5. Department of Clinical Chemistry; Erasmus Medical Center-Sophia Children's Hospital; Rotterdam the Netherlands
6. Department of Endocrinology; Erasmus Medical Center-Sophia Children's Hospital; Rotterdam the Netherlands
7. Department of Child and Adolescent Psychiatry; Erasmus Medical Center-Sophia Children's Hospital; Rotterdam The Netherlands