1. Department of Epidemiology and Biostatistics, Amsterdam Public Health Research InstituteVU University Medical Center Amsterdam The Netherlands
2. Centre for Prevention and Health Services ResearchNational Institute for Public Health and the Environment (RIVM) Bilthoven The Netherlands
3. Department of Public Health, Erasmus MCUniversity Medical Center Rotterdam Rotterdam The Netherlands
4. Institute for Risk Assessment Sciences (IRAS)Utrecht University Utrecht The Netherlands
5. Groningen Research Institute for Asthma and COPDUniversity of Groningen Groningen The Netherlands
6. Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children's HospitalUniversity Medical Center Groningen, University of Groningen Groningen The Netherlands
7. Department of Health Sciences, University Medical Center GroningenUniversity of Groningen Groningen The Netherlands