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Four year efficacy of prophylactic human papillomavirus quadrivalent vaccine against low grade cervical, vulvar, and vaginal intraepithelial neoplasia and anogenital warts: randomised controlled trial

BMJ 2010; 341 doi: https://doi.org/10.1136/bmj.c3493 (Published 20 July 2010) Cite this as: BMJ 2010;341:c3493