[1] Emory Univ, Sch Med, Dept Gynecol & Obstet, Atlanta, GA 30303 USA
[2] Emory Vaccine Ctr, Atlanta, GA USA
[3] Med Univ Vienna, Dept Gynecol & Obstet, Vienna, Austria
[4] Univ Copenhagen, Rigshosp, Danish Canc Soc, Dept Virus Hormones & Canc,Inst Canc Epidemiol, DK-2100 Copenhagen, Denmark
[5] Univ Bergen, Dept Clin Med, Bergen, Norway
[6] Haukeland Hosp, Dept Obstet & Gynecol, N-5021 Bergen, Norway
[7] Univ New Mexico, Dept Pathol, Hlth Sci Ctr, Albuquerque, NM 87131 USA
[8] Univ New Mexico, Hlth Sci Ctr, Dept Obstet & Gynecol, Albuquerque, NM 87131 USA
[9] Univ Rosario, Bogota, Colombia
[10] Indiana Univ Sch Med, Dept Med, Indianapolis, IN USA
[11] Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA
[12] Royal Womens Hosp, Dept Microbiol & Infect Dis, Parkville, Vic, Australia
[13] Univ Melbourne, Dept Obstet & Gynecol, Melbourne, Vic, Australia
[14] Karolinska Inst, Danderyd Hosp, Dept Obstet & Gynaecol, Stockholm, Sweden
[15] Univ Hong Kong, Dept Obstet & Gynecol, Hong Kong, Hong Kong, Peoples R China
[16] Med Coll Georgia, Dept Family Med, Augusta, GA 30912 USA
[17] Med Coll Georgia, Dept Obstet & Gynecol, Augusta, GA 30912 USA
[18] Univ Cent Hosp, Dept Obstet & Gynecol, Helsinki, Finland
[19] Inst Natl Sante Publ Quebec, Direct Risques Biol & Sante Travail, Quebec City, PQ, Canada
[20] IDIBELL, Inst Catala Oncol, Canc Epidemiol Res Program, Barcelona, Spain
[21] Warsaw Med Univ, Ctr Diagnost & Treatment Sexually Transmitted Dis, Dept Dermatol & Venereol, Warsaw, Poland
[22] Natl Canc Inst, Dept Canc Epidemiol, Bogota, Colombia
[23] Merck & Co Inc, Merck Res Labs, West Point, PA USA