1. Viral Oncology Program; The Ohio State University Comprehensive Cancer Center; Columbus OH
2. Institut Català d'Oncologia -IDIBELL; L'Hospitalet de Llobregat; Catalonia Spain
3. Division of Cancer Epidemiology and Genetics; National Cancer Institute; Rockville MD
4. Samuel Oschin Comprehensive Cancer Institute; Cedars Sinai Medical Center; Los Angeles CA
5. Department of Pathology; VU University Medical Center; Amsterdam The Netherlands
6. International Agency for Research on Cancer; Lyon France
7. Unit of Cancer Epidemiology; Scientific Institute of Public Health; Brussels Belgium
8. University of Antwerp; Belgium