1. The Generation R Study Group,
2. Public Health, and
3. Departments of Pediatrics,
4. Epidemiology, Erasmus Medical Center, Rotterdam, the Netherlands;
5. Obstetrics and Gynecology, Erasmus Medical Center, University Medical Centre Rotterdam, Rotterdam, the Netherlands; and
6. Divisions of Respiratory Medicine and Allergology and Neonatology, Departments of Pediatrics and
7. Municipality of Rotterdam, Rotterdam, the Netherlands