1. The Generation R Study Group Erasmus University Medical Center Rotterdam The Netherlands
2. Department of Pediatrics Erasmus University Medical Center Rotterdam The Netherlands
3. Departments of Obstetrics and Gynecology Erasmus University Medical Center Rotterdam The Netherlands
4. Department of Pediatrics Division of Respiratory Medicine and Allergology Erasmus University Medical Center Rotterdam The Netherlands
5. Clinical Bioinformatics Unit Department of Pathology Erasmus MC University Medical Center Rotterdam The Netherlands