<qa>  What was the goal of the study?The purpose of this study was to determine if delayed dosing of recombinant human papillomavirus HPV quadrivalent Types 6, 11, 16, and 18 vaccine in 9-18 year old girls elicited an equivalent immune response geometric mean titers to HPV 6,11,16, and 18 as measured one month after receipt of a 3rd dose of HPV vaccine when compared to vaccine delivered according to the recommended dosing schedule. 