Cross-protective efficacy of two human papillomavirus vaccines: a systematic review and meta-analysis.
Lancet Infect Dis. 2012 Oct;12(10):781-9. doi: 10.1016/S1473-3099(12)70187-1. Epub 2012 Aug 22.
Lancet Infect Dis. 2012.
PMID: 22920953
Review.