1. Respiratory Epidemiology; Occupational Medicine and Public Health; National Heart and Lung Institute; Imperial College; London UK
2. MRC-PHE Centre for Environment & Health; London UK
3. Centre for Research in Environmental Epidemiology (CREAL); Universitat Pompeu Fabra; CIBERESP; Barcelona Spain
4. Arizona Respiratory Center; University of Arizona; Tucson AZ USA
5. Molecular Genetics of Lung Diseases; Comprehensive Pneumology Center; Helmholtz Zentrum München; German Research Center for Environmental Health; Neuherberg Germany
6. Swiss Tropical and Public Health Institute; Basel Switzerland
7. University of Basel; Basel Switzerland
8. Pédiatrie; CHU de Grenoble; Institut Albert Bonniot; INSERM; Grenoble France
9. Université Joseph Fourier; Grenoble France
10. Bergen Respiratory Research Group; Institute of Medicine; University of Bergen; Bergen Norway
11. Department of Occupational Medicine; Haukeland University Hospital; Bergen Norway
12. Department of Medical Sciences: Respiratory, Allergy and Sleep Research; Uppsala University; Uppsala Sweden
13. Institute of Epidemiology I; Helmholtz Zentrum; Munich Germany
14. Institute and Outpatient Clinic for Occupational; Social and Environmental Medicine; Inner City Clinic; University Hospital Munich; Ludwig Maximilian University of Munich; Munich Germany