Olsson, Sven-Eric Evaluation of quadrivalent HPV 6/11/16/18 vaccine efficacy against cervical and anogenital disease in subjects with serological evidence of prior vaccine type HPV infection. [electronic resource] - Human vaccines Oct 2009 - 696-704 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1554-8619 Standard No.: 10.4161/hv.5.10.9515 doi Subjects--Topical Terms: AdolescentAdultAntibodies, Viral--bloodCervix Uteri--cytologyFemaleFollow-Up StudiesHuman Papillomavirus Recombinant Vaccine Quadrivalent, Types 6, 11, 16, 18HumansPapillomavirus Infections--epidemiologyPapillomavirus Vaccines--adverse effectsPlacebos--administration & dosageVulva--pathologyYoung Adult