1. The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.
2. Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands.
3. Academic Center for Thyroid Diseases, Erasmus Medical Center, Rotterdam, The Netherlands.
4. Department of Clinical Chemistry, Erasmus Medical Center – Sophia Children's Hospital, Rotterdam, The Netherlands.
5. Department of Pediatrics, Erasmus Medical Center – Sophia Children's Hospital, Rotterdam, The Netherlands.
6. Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.
7. Department of Obstetrics and Gynecology, Erasmus Medical Center – Sophia Children's Hospital, Rotterdam, The Netherlands.