Affiliation: | a Department of Pediatrics, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands b Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands c Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands d Department of Pulmonology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands e Institute for Risk Assessment Sciences, University of Utrecht, Utrecht, The Netherlands f Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands g Department of Pediatrics, Erasmus University Medical Center, Sophia Children's Hospital, Rotterdam, The Netherlands h National Institute for Public Health and the Environment, Bilthoven, The Netherlands |