Funding : The Costa Rica HPV Vaccine Trial is a longstanding collaboration between investigators in Costa Rica and the US National Cancer Institute ( NCI ) . The trial is sponsored and funded by the NCI ( contract N01 - CP-11005 ) , with funding support from the National Institutes of Health Office of Research on Women 's Health . GlaxoSmithKline ( GSK ) Biologicals provided vaccine and support for aspects of the trial associated with regulatory submission needs of the company under a clinical trials agreement ( FDA BB - IND 7920 ) during the four year , randomized blinded phase of our study . This manuscript was not prepared in collaboration with GSK Biologicals investigators , and GSK Biologicals had no role in the study design and the collection , analysis , and interpretation of data from CVT in this paper , or in the writing of the article . GSK Biologicals took no part in the decision to submit an article for publication . The analysis reported here was supported by the intramural research programs of the NCI and the National Institute of Environmental Health Sciences , both parts of the National Institutes of Health .