1. Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain
2. Center for Public Health Research (CSISP), Valencia, Spain
3. University of Valencia, Valencia, Spain
4. Center for Research in Environmental Epidemiology (CREAL), Barcelona, Spain
5. Hospital del Mar Research Institute (IMIM), Barcelona, Spain
6. Department of Preventive Medicine, University of Oviedo, Asturias, Spain
7. Public Health Division of Gipuzkoa, Basque Government, Gipuzkoa, Spain
8. Department of Preventive Medicine and Public Health, (EHU-UPV), University of the Basque Country, Gipuzkoa, Spain.
9. Laboratory of Medical Investigations, San Cecilio University Hospital, University of Granada, Granada, Spain
10. Pompeu Fabra University, Barcelona, Spain