1Harper DM, Franco EL,Wheeler C, et al. Efficacy of a bi- valent L1 virus-like particle vaccine in prevention of in- fection with human papillomavirus types 16 and 18 in young women : a randomised controlled trial [ J ]. Lancet, 2004,364 ( 9447 ) : 1757-1765.
2Clifford GM,Smith JS, Plummer M, et al. Human papillo- mavirus types in invasive cervical Cancer worldwide: a recta-analysis[ J]. Br J Cancer,2003,88 ( 1 ) :63-73.
4Masia G, Mazzoleni AP, Contu G, et al. Epidemiology and genotype distribution of human papillomavirus (HPV) in women of Sardinia ( Italy ) [ J ]. Vaccine, 2009,27 : A11- A16.
7Agarossi A, Ferrazzi E, Parazzini F, et al. Prevalence and type distribution of high-risk human papillomavirus infec- tion in women undergoing voluntary cervical Cancer screening in Italy [ J ]. J Med Virol,2009,81 (3) :529-535.