1. The Generation R Study Group Erasmus MC, University Medical Center Rotterdam The Netherlands
2. Department of Pediatrics, Division of Respiratory Medicine and Allergology Erasmus MC, University Medical Center Rotterdam The Netherlands
3. Department of Epidemiology Erasmus MC, University Medical Center Rotterdam The Netherlands
4. Department of Pediatrics, Division of Neonatology Erasmus MC, University Medical Center Rotterdam The Netherlands
5. Department of Internal Medicine, Division of Allergology Erasmus MC, University Medical Center Rotterdam The Netherlands
6. Department of Pediatrics Erasmus MC, University Medical Center Rotterdam The Netherlands