1. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
2. Institute of Epidemiology I, Helmholtz Zentrum München, German Research Centre for Environmental Health, Neuherberg, Germany
3. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
4. Sachs’ Children’s Hospital, Stockholm, Sweden
5. Department of Pediatrics, Technical University of Munich, Munich, Germany
6. Department for Environmental Immunology, Helmholtz Centre for Environmental Research–UFZ, Leipzig, Germany
7. Department of Pediatrics, Marien-Hospital Wesel, Wesel, Germany
8. Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
9. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
10. Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
11. Leibniz Research Institute for Environmental Medicine, University of Düsseldorf, Düsseldorf, Germany
12. Environmental Medicine and Hygiene, University of Leipzig, Leipzig, Germany
13. Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
14. Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children’s Hospital, University of Groningen, University Medical Center Groningen, Groningen Research Institute for Asthma and COPD (GRIAC), Groningen, the Netherlands
15. Department of Pediatrics, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
16. School of Public Health, University of Alberta, Edmonton, Alberta, Canada
17. University of Groningen, Department of Pulmonology, University Medical Center Groningen, Groningen, the Netherlands
18. GRIAC, Groningen, the Netherlands
19. Division of Metabolic Diseases and Nutritional Medicine, Ludwig-Maximilians-University of Munich, Dr. von Hauner Children’s Hospital, Munich, Germany