1. Centre of Epidemiological Studies of HIV/AIDS and STI of Catalonia (CEEISCAT), Health Department, Generalitat de Catalunya, Badalona, Spain
2. Germans Trias i Pujol Research Institute (IGTP), Campus Can Ruti, Badalona, Spain
3. PhD in Methodology of Biomedical Research and Public Health. Department of Pediatrics, Obstetrics and Gynecology and Preventive Medicine, Univ Autonoma de Barcelona, Badalona, Spain
4. Department of Pediatrics, Obstetrics and Gynecology and Preventive Medicine, Univ Autonoma de Barcelona, Badalona, Spain
5. Stop, Barcelona, Spain
6. Àmbit Prevenció, Barcelona, Spain
7. CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain