1. Unit of Addictive Disorders; San Marcelino Primary Health Care Center; Valencia Spain
2. Center for Public Health Research (CSISP/FISABIO); Valencia Spain
3. Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP); Madrid Spain
4. Nursing School; University of Valencia; Valencia Spain
5. Public Health Department; Basque Government; Gipuzkoa Spain
6. University of Basque Country UPV/EHU; Guipuzkoa Spain
7. Health Research Institute (BIODONOSTIA); Guipuzkoa Spain
8. University of Oviedo; Oviedo Spain
9. Center for Research in Environmental Epidemiology (CREAL); Barcelona Catalonia Spain
10. Hospital del Mar Research Institute (IMIM); Barcelona Catalonia Spain
11. Universitat Pompeu Fabra (UPF); Barcelona Catalonia Spain
12. Medicine Department; Jaume I University; Castelló de la Plana Spain