1. Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
2. Consortium for Research in Epidemiology and Public Health (CIBERESP), Spain
3. National Institute of Health and Medical Research (INSERM), U823, Team of Environmental Epidemiology applied to Reproduction and Respiratory Health, Grenoble, France
4. Centre of Public Health Research (CSISP), Valencia, Spain
5. School of Nursing, University of Valencia, Valencia, Spain
6. Public Health Division of Gipuzkoa, Basque Country Government, Gipuzkoa, Spain
7. BioDonostia Health Research Institute, Donostia, Spain
8. University of Oviedo, Oviedo, Spain
9. Department of Public Health and Preventive Medicine, University of Basque Country, Bilbao, Spain
10. Hospital del Mar Medical Research Institute (IMIM), Barcelona, Spain
11. Pompeu Fabra University, Department of Experimental and Health Sciences, Barcelona, Spain