NCT00092521 and NCT00092534.
Effect of the human papillomavirus (HPV) quadrivalent vaccine in a subgroup of women with cervical and vulvar disease: retrospective pooled analysis of trial data
Elmar A. Joura·Gonzalo Pérez·Suzanne M. Garland·Kevin A. Ault·Margaret K. James·Heather L. Sings·Warner K. Huh·Richard M. Haupt·Jorma Paavonen·Daron G. Ferris