1 Doctorate Program in Methodology of Biomedical Research and Public Health, Department of Paediatrics, Obstetrics and Gynaecology and Preventive Medicine, Universitat Autònoma de Barcelona, Badalona, Spain. [email protected].
2 Centre for Epidemiological Studies on Sexually Transmitted Infections and AIDS of Catalonia (CEEISCAT), Ministry of Health of the Government of Catalonia, Badalona, Spain. [email protected].
3 Germans Trias i Pujol Research Institute (IGTP), Campus Can Ruti, Badalona, Spain. [email protected].
4 Fundació Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Edifici Muntanya, Carretera de Can Ruti, Camí de les Escoles s/n, Badalona, 08916, Spain. [email protected].
5 Centre for Epidemiological Studies on Sexually Transmitted Infections and AIDS of Catalonia (CEEISCAT), Ministry of Health of the Government of Catalonia, Badalona, Spain.
6 Germans Trias i Pujol Research Institute (IGTP), Campus Can Ruti, Badalona, Spain.
7 Biomedical Research Center Network for Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.