4Sandri MT, Riggio D, Salvatici M, et al. Typing of human papillomavirus in women with cervical lesions: prevalence and distribution of different genotypes[J]. J Med Virol, 2009,81 (2) :271-277.
5Castle PE, Solomon D, Schiffman M, et al. Human papillo- mavirus type 16 infections and 2-year absolute risk of cervical precancer in women with equivocal or mild cytologic abnormal- ities[J]. J Natl Cancer Inst,2005,97(14):1066-1071.
6Hamlin-Douglas LK, Coutlfe F, Roger M, et al. Prevalence and age distribution of human papillomavirus infection in a population of Inuit women in Nunavik, Quebec[J]. Cancer Epidemiol Biomarkers Prev,2008,17(11) :3141-3149.
7Lee SH, Kang D, Seo SS, et al. Multiple HPV infection in cervical cancer screened by HPV DNA chip[J]. Cancer Let- ter,2003,198(2):187-192.