Affiliation: | a Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands c Department of Pulmonology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands l Department of Pediatric Pulmonology and Pediatric Allergology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands b Department of Medicine, St Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada d Occupational and Environmental Lung Disease Unit, University of British Columbia, Vancouver, British Columbia, Canada e National Institute for Public Health and the Environment, Bilthoven, The Netherlands f Institute for Risk Assessment Sciences, University of Utrecht, Utrecht, The Netherlands g Department of Pediatrics, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands h Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands i Care and Public Health Research Institute (Caphri), Maastricht University, The Netherlands j Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada k Department of Community Health Sciences, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada |