[1] Sci Inst Publ Hlth, Canc Epidemiol Unit, B-1050 Brussels, Belgium
[2] CIBER Epidemiol & Salut Publ, Barcelona, Spain
[3] Ctr Dis Control & Prevent, Div Canc Prevent & Control, Atlanta, GA USA
[4] European Inst Oncol, Gynecol Div, Prevent Gynecol Unit, Milan, Italy
[5] Univ Calif San Francisco, Dept Med, San Francisco, CA USA
[6] Univ York, Hull York Med Sch, York YO10 5DD, N Yorkshire, England
[7] Kimmel Canc Ctr, Div Viral Oncol, Baltimore, MD USA
[8] Ctr Prevenz Oncol, Canc Epidemiol Unit, Turin, Italy
[9] NCI, Div Canc Epidemiol & Genet, NIH, DHHS, Bethesda, MD 20892 USA
[10] Victorian Cytol Serv, Victorian Cytol Serv Registries, Melbourne, Vic, Australia
[11] Chinese Acad Med Sci, Inst Canc, Dept Canc Epidemiol, Beijing 100021, Peoples R China
[12] Univ Cape Town, Dept Obstet & Gynaecol, Cape Town, South Africa
[13] Groote Schuur Hosp, ZA-7925 Cape Town, South Africa
[14] Bar Ilan Univ, Fac Med, IL-52100 Ramat Gan, Israel
[15] Western Galilee Hosp, Dept Obstet & Gynecol, Nahariyya, Israel
[16] Hop Xavier Bichat, Dept Gastroenterol & Proctol, Paris, France
[17] Univ S Florida, H Lee Moffitt Canc Ctr, Dept Canc Epidemiol, Tampa, FL 33682 USA
[18] Int Agcy Res Canc, F-69372 Lyon, France
[19] Inst Cervix, Paris, France