?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Spayne%2C+J&rft.aufirst=J&rft.aulast=Spayne&rft.date=September+2021&rft.volume=11&rft.issue=9&rft.atitle=Estimate+of+global+human+papillomavirus+vaccination+coverage%3A+analysis+of+country-level+indicators&rft.title=BMJ+Open&rft.genre=article