Proof-of-principle evaluation of the efficacy of fewer than three doses of a bivalent HPV16/18 vaccine. - Kreimer AR; Rodriguez AC; Hildesheim A; Herrero R; Porras C; Schiffman M; González P; Solomon D; Jiménez S; Schiller JT; Lowy DR; Quint W; et al. (JNCI: Journal of the National Cancer Institute, 2011)