1. Institute of Epidemiology I, Helmholtz Zentrum München, German Research Centre for Environmental Health, Munich, Germany
2. Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
3. Centre for Epidemiology, Institute of Population Health, Manchester Academic Health Sciences Centre, The University of Manchester, Manchester, United Kingdom
4. School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
5. IUF-Leibniz Research Institute for Environmental Medicine, University of Düsseldorf, Düsseldorf, Germany
6. Air Quality & Sustainable Nanotechnology, IUTA (Institut für Energie-und Umwelttechnik e.V.), Duisburg, Germany
7. Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
8. Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Catalonia, Spain
9. Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain
10. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands
11. Department of Pediatric Pulmonology and Pediatric Allergology, Beatrix Children’s Hospital, and
12. GRIAC (Groningen Research Institute of Asthma and COPD), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
13. Department of Pediatrics, Division of Respiratory Medicine, Erasmus University Medical Center/Sophia Children’s Hospital, Rotterdam, the Netherlands
14. Institute of Epidemiology II, Helmholtz Zentrum München, German Research Centre for Environmental Health, Munich, Germany
15. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
16. Institute of Inflammation and Repair, Manchester Academic Health Sciences Centre, The University of Manchester, Manchester, United Kingdom
17. Department of Epidemiology, Lazio Regional Health Service ASL RME (Dipartimento di epidemiologia ASL Roma E), Rome, Italy
18. Centre of Public Health Research (CSISP), Valencia, Spain
19. Department of Preventive Medicine, University of Oviedo, Asturias, Spain
20. BioDonostia Health Research Institute, Donostia, Spain
21. Department of Public Health and Preventive Medicine, University of Basque Country, Bilbão, Spain
22. Hospital del Mar Medical Research Institute (IMIM), Barcelona, Catalonia, Spain
23. Pompeu Fabra University, Department of Experimental and Health Sciences, Barcelona, Catalonia, Spain