Comment on

• Population-level impact of the bivalent, quadrivalent, and nonavalent human papillomavirus vaccines: a model-based analysis.

  Van de Velde N, Boily MC, Drolet M, Franco EL, Mayrand MH, Kliewer EV, Coutlée F, Laprise JF, Malagón T, Brisson M. Van de Velde N, et al. J Natl Cancer Inst. 2012 Nov 21;104(22):1712-23. doi: 10.1093/jnci/djs395. Epub 2012 Oct 27. J Natl Cancer Inst. 2012. PMID: 23104323
• RE: population-level impact of the bivalent, quadrivalent, and candidate nonavalent human papillomavirus vaccines: a comparative model-based analysis.

  Suba EJ, González-Mena LE, Van Thái NE, Raab SS. Suba EJ, et al. J Natl Cancer Inst. 2013 May 1;105(9):664; discussion 665-6. doi: 10.1093/jnci/djt060. Epub 2013 Mar 15. J Natl Cancer Inst. 2013. PMID: 23503601 No abstract available.