1. Infections and Immunoepidemiology Branch, Division of Cancer Epidemiology and Genetics; National Cancer Institute; Rockville Maryland USA
2. HPV Immunology Laboratory, Frederick National Laboratory for Cancer Research, Leidos; Biomedical Research, Inc.; Frederick Maryland USA
3. Department of Epidemiology; Shanghai Cancer Institute; Shanghai China
4. Department of General Surgery, Zhongshan Hospital, School of Medicine; Fudan University; Shanghai China
5. Department of Pathology, Shanghai Cancer Center; Fudan University; Shanghai China
6. Department of Pathology; The University of Texas MD Anderson Cancer Center; Houston Texas USA
7. Stanford Cancer Institute; Palo Alto California USA
8. Stanford Prevention Research Center, Department of Medicine; Stanford School of Medicine; Palo Alto California USA
9. Biostatistics Branch, Division of Cancer Epidemiology and Genetics; National Cancer Institute; Rockville Maryland USA