1. Division of Molecular Diagnostics of Oncogenic Infections; Infection, Inflammation and Cancer Program, German Cancer Research Center (DKFZ); Heidelberg Germany
2. Servicio De Microbiología, Hospital Universitario Ramón Y Cajal and Instituto Ramón Y Cajal De Investigaciones Sanitarias (IRYCIS); Madrid Spain
3. Red Española De Investigación En Patología Infecciosa (REIPI); Madrid Spain
4. CIBER Epidemiología Y Salud Pública (CIBERESP); Madrid Spain
5. Environmental and Cancer Epidemiology Unit; National Center of Epidemiology, Instituto De Salud Carlos III; Madrid Spain
6. Oncology and Hematology Area, IIS Puerta De Hierro, Cancer Epidemiology Research Group; Madrid Spain
7. Universidad De León; León Spain
8. Cancer Epidemiology Research Programme, IDIBELL, Institut Català D'oncologica L'hospitalet De Llobregat; Barcelona Spain
9. Department of Clinical Sciences; Faculty of Medicine, University of Barcelona; Barcelona Spain
10. National School of Public Health; Instituto De Salud Carlos III; Madrid Spain
11. IDIVAL-University of Cantabria; Santander Spain
12. Navarra Public Health Institute; Pamplona Spain
13. Navarra Institute for Health Research (IdiSNA); Pamplona Spain
14. IUOPA, Universidad De Oviedo; Asturias Spain
15. Public Health Division of Gipuzkoa; Biodonostia Research Institute; San Sebastian Spain
16. Servicio De Medicina Digestiva, Hospital Univesitario Dr. Peset, Universidad De Valencia; Valencia Spain
17. Centro De Investigación En Salud Y Medio Ambiente (CYSMA), Universidad De Huelva; Huelva Spain
18. Hospital General De Riotinto; Huelva Spain
19. Instituto De Investigación Biosanitaria De Granada (Ibs.GRANADA), Hospitales Universitarios De Granada/Universidad De Granada; Granada Spain
20. Department of Epidemiology; Murcia Regional Health Council, IMIB-Arrixaca; Murcia Spain
21. Centre for Research in Environmental Epidemiology (CREAL); Barcelona Spain
22. IMIM (Hospital Del Mar Medical Research Institute); Barcelona Spain
23. Universitat Pompeu Fabra (UPF); Barcelona Spain
24. School of Public Health; Athens Greece
25. Department of Pathology; Radboud University Medical Centre; Nijmegen The Netherlands
26. Department of Laboratory Medicine; Nijmegen Institute for Infection, Inflammation and Immunity (N4i) & Radboud University Centre for Oncology (RUCO), Radboud University Medical Centre; Nijmegen The Netherlands