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Title
Sustained efficacy up to 4.5 years of a bivalent L1 virus-like particle vaccine against human papillomavirus types 16 and 18: follow-up from a randomised control trial.
Authors
Harper DM; Franco EL; Wheeler CM; Moscicki A; Romanowski B; Roteli-Martins CM; Jenkins D; Schuind A; Costa Clemens SA; Dubin G; HPV Vaccine Study group