1. The Generation R Study Group; Erasmus Medical Center - Sophia Children's Hospital; Rotterdam the Netherlands
2. Department of Epidemiology; Erasmus Medical Center - Sophia Children's Hospital; Rotterdam the Netherlands
3. Department of Paediatrics; Erasmus Medical Center - Sophia Children's Hospital; Rotterdam the Netherlands
4. Department of Biostatistics; Erasmus Medical Center; Rotterdam the Netherlands
5. Department of Obstetrics and Gynaecology; Erasmus Medical Center; Rotterdam the Netherlands