Summary data from the Costa Rica Vaccine Trial ( CVT ; NCT@ ) and ~ the PATRICIA trial ( NCT@ ) , two phase @ , double-blind , randomised controlled clinical trials of the HPV-@ / @ AS@-adjuvanted vaccine in young women , were combined in a post-hoc analysis ( GlaxoSmithKline -LSB- GSK -RSB- e-track number @ ) to investigate the efficacy of fewer than three doses of the HPV-@ / @ vaccine after @ years of follow-up .