1. Department of Health Security; National Institute for Health and Welfare; Kuopio Finland
2. ISGlobal; Barcelona Institute for Global Health - Campus MAR; Barcelona Spain
3. Universitat Pompeu Fabra (UPF); Barcelona Spain
4. CIBER Epidemiología y Salud Pública (CIBERESP); Madrid Spain
5. Institute of Public Health and Clinical Nutrition; University of Eastern Finland; Kuopio Finland
6. Department of Environmental and Biological Sciences; University of Eastern Finland; Kuopio Finland
7. Helmholtz Zentrum Muenchen - Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH); Institute for Asthma and Allergy Prevention; Neuherberg Germany
8. Institute for Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics; Philipps-University of Marburg; Marburg Germany
9. Department of Pediatrics; Kuopio University Hospital; Kuopio Finland
10. Dr. von Hauner Childrens Hospital; Ludwig Maximilians University Munich; Munich Germany
11. Member of the German Centre for Lung Research; Munich Germany
12. Department of Public Health; University of Helsinki; Helsinki Finland