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