1. Institute for Risk Assessment SciencesUtrecht University Utrecht The Netherlands
2. Center for Nutrition, Prevention and Health ServicesNational Institute for Public Health and the Environment Bilthoven The Netherlands
3. Department of Pediatric Pulmonology, Beatrix Children's Hospital, University Medical Center GroningenUniversity of Groningen Groningen The Netherlands
4. Groningen Research Institute for Asthma and COPDUniversity of Groningen Groningen The Netherlands
5. Department of Epidemiology, University Medical Center GroningenUniversity of Groningen Groningen The Netherlands
6. Julius Center for Health Sciences and Primary CareUniversity Medical Center Utrecht Utrecht Netherlands