1. Generation R Study Group, Erasmus Medical Center (Erasmus MC), University Medical Center, Rotterdam, the Netherlands
2. Department of Pediatrics, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
3. Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Durham, North Carolina, USA
4. Department of Child and Adolescent Psychiatry, Erasmus MC, University Medical Center, Rotterdam, the Netherlands
5. Department Risk Analysis for Products in Development, Netherlands Organization for Applied Scientific Research, Utrecht, the Netherlands