1. Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.
2. Health and Youth Care Inspectorate, Utrecht, The Netherlands.
3. Department of Child and Adolescent Psychiatry, University Medical Center, Erasmus MC, Rotterdam, The Netherlands.
4. Department of Pediatrics, University Medical Center Rotterdam, Erasmus MC, Rotterdam, The Netherlands.
5. Department of Psychology, Education and Child Studies, Erasmus School of Social and Behavioural Sciences, Erasmus University Rotterdam, Rotterdam, The Netherlands.
6. The Generation R Study, University Medical Center Rotterdam, Erasmus MC, Rotterdam, The Netherlands.
7. Haga Teaching Hospital, The Hague, The Netherlands.
8. Hospital Pharmacy, Erasmus Medical Center, Rotterdam, The Netherlands.