

5National Drug and Alcohol Research Centre, University of New South Wales, Sidney, Australia.4National School of Public Health, Carlos III Institute of Health, 28029 Madrid, Spain.3Department of Preventive Medicine and Public Health, Faculty of Medicine, Complutense University, Madrid, Spain.2Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain.1National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain.

Roberto Pastor-Barriuso, research associate 1 2.Lucas Wiessing, principal scientist 7,.Louisa Degenhardt, Scientia professor and principal research fellow 5 6,.B Iciar Indave, doctoral candidate 1 2,.

