1. Department of Cancer Epidemiology, Center for Infection Research in Cancer; Moffitt Cancer Center; Tampa FL USA
2. Center for Infectious Diseases; The University of Texas School of Public Health at Houston; Houston TX USA
3. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health; Bethesda MD USA
4. Department of Biomedical Science, Cancer Prevention and Control; Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center; Los Angeles CA USA
5. Institute of the Cervix; Paris France
6. International Agency for Research on Cancer; Lyon France