1. Infections and Cancer Unit; Cancer Epidemiology Research Program, Catalan Institute of Oncology (ICO); Barcelona Spain
2. Bellvitge Institute of Biomedical Research (IDIBELL); Barcelona Spain
3. CIBER in Epidemiology and Public Health (CIBERESP); Barcelona Spain
4. UMR MIVEGEC, National Center for Scientific Research (CNRS); Montpellier France