1. ISGlobal, 08003 Barcelona, Spain
2. Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
3. CIBER Epidemiología y Salud Pública (CIBERESP), 28029 Madrid, Spain
4. Department of Public Health and Clinical Medicine, Umeå University, 901 87 Umeå, Sweden
5. Genomes for Life-GCAT Lab, German Trias i Pujol Research Institute (IGTP), 08916 Badalona, Spain
6. National Institute for Public Health and the Environment, 3721 Bilthoven, The Netherlands
7. Institute of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
8. Swiss Tropical and Public Health Institute Basel, 4123 Allschwil, Switzerland
9. University of Basel, 4001 Basel, Switzerland
10. Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, 115 27 Athens, Greece
11. Institute for Risk Assessment Sciences (IRAS), Utrecht University, 3584 Utrecht, The Netherlands
12. MRC Centre for Environment and Health, School of Public Health, Imperial College London, London W2 1PG, U.K.
13. Department of Pediatric Pulmonology, Beatrix Children’s Hospital, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands
14. Groningen Research Institute for Asthma and COPD, University of Groningen, 9713 Groningen, The Netherlands
15. Department of Cardiology, Danderyd Hospital, 171 77 Stockholm, Sweden
16. Department of Clinical Sciences and Education, Södersjukhuset, Karolinska Institutet, 171 77 Stockholm, Sweden
17. Sachś Children and Youth Hospital, Södersjukhuset, 118 61 Stockholm, Sweden
18. Department of Epidemiology, Lazio Region Health Service/ASL Roma 100147 Rome, Italy
19. Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany
20. IBE, Faculty of Medicine, Ludwig-Maximilians-Universität, 81377 Munich, Germany