1. Division of Cancer Epidemiology and GeneticsNational Cancer Institute Rockville Maryland
2. International Health DivisionDemographic and Health SurveysICF International Rockville Maryland
3. Division of Gastroenterology and HepatologyDepartment of MedicineStanford University School of Medicine Palo Alto California
4. Department of Infectious DiseaseShanghai Jiao Tong University Affiliated Sixth People's Hospital Shanghai China
5. Department of Biochemistry and MicrobiologyOklahoma State University Center for Health Sciences Tulsa Oklahoma
6. International Agency for Research on Cancer Lyon France
7. Hepatitis UnitDisease Control & EliminationMedical Research Council Unit The Gambia Fajara The Gambia
8. Department of EpidemiologyJohns Hopkins Bloomberg School of Public Health Baltimore Maryland
9. Department of Microbiology and ImmunologyStanford University School of Medicine Palo Alto California