1. Public Health Agency, Barcelona, Spain
2. Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
3. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBER ESP), Spain
4. PhD Programme in Public Health and Methodology of Biomedical Research, Universitat Autònoma de Barcelona, Barcelona, Spain
5. Department of Preventive Medicine
6. Department of Health, Xunta de Galicia, Santiago de Compostela, Spain
7. Catalan Institute of Oncology and Institute of Biomedical Research of Bellvitge, L’Hospitalet de Llobregat, Spain
8. Municipal Health Institute, City Council of Terrassa, Terrassa, Spain
9. Department of Health, Generalitat de Catalunya, Barcelona, Spain