1. Department of Pediatrics/Respiratory Medicine; Erasmus University Medical Center - Sophia Children's Hospital; Rotterdam The Netherlands
2. Department of Epidemiology; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
3. Department of Pediatrics; Beatrix Children's Hospital; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
4. GRIAC Research Institute; Groningen The Netherlands
5. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht The Netherlands
6. Department of Pulmonology; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
7. Department of Pediatric Pulmonology and Pediatric Allergology; Beatrix Children's Hospital; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
8. Centre for Prevention and Health Services Research; National Institute for Public Health and the Environment (RIVM); Bilthoven The Netherlands
9. Institute for Risk Assessment Sciences; University Medical Centre Utrecht; Utrecht The Netherlands
10. Department of General Pediatrics; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands