1. International Agency for Research on Cancer; Lyon France
2. Institute of Social and Preventive Medicine (ISPM), University of Bern; Bern Switzerland
3. Swiss HIV Cohort Study; Coordination and Data Center; Lausanne Switzerland
4. Cancer Registry of the Cantons of Zurich and Zug; Zurich Switzerland
5. Cancer Registry of the Cantons of Vaud and Neufchatel; Lausanne Switzerland
6. Cancer Registry of Basel; Basel Switzerland
7. Cancer Registry of the Canton of Geneva; Geneva Switzerland
8. Division of Infectious Diseases and Hospital Epidemiology; University Hospital Zurich; Zurich Switzerland
9. Service of Infectious Diseases, Vaud University Hospital; Lausanne Switzerland
10. Department of Infectious Diseases; Unit HIV/AIDS, Bern University Hospital and University of Bern; Bern Switzerland
11. Division of Infectious Diseases and Hospital Epidemiology; Cantonal Hospital of St Gallen; St Gallen Switzerland
12. Division of Infectious Diseases and Hospital Epidemiology; University Hospital Basel; Basel Switzerland
13. Regional Hospital; Lugano Switzerland
14. Department of Genome Modifications and Carcinogenesis; Infection and Cancer Program, German Cancer Research Center (DKFZ); Heidelberg Germany
15. Centre for Infectious Disease Epidemiology and Research (CIDER), University of Cape Town; Rondebosch Cape Town South Africa