3Munoz N, Franceschi S, Bosetti C, et al. Role of parity and human papillomavirus in cervical cancer: the LARC, muhicentric case- contrd Study[J]. Lancet, 2002, 359:1093 - 1101.
4Krishnan AV, Trump DL, Johnson CS, et al. The role of vitanmin D in cancer prevention and treatment [ J ]. Endocrinol Metab Clin North Am, 2010, 39(2) : 401 -418.
5Nemazannikova N, Antonas K, Dass CR. Role of vitamin D metab- uhsm in cutaneous turaour formation and progression [ 31. 3 Pharm Pharmacol, 2013, 65(1): 2-10.
6Jemal A, Bray F, Center MM, et al. Global cancer statistics[J]. CA Cancer J Clin, 2011, 61(2) : 69 -90.
7Parkin DM, Dray F, Ferlay J, et al. Estimatiing the world cancer burdern: Globocan 2000[J]. Int J Cancer, 200l, 94: 153.
9Castellsagu~ X, Bosch FX, Muoz N. Environmental co - factors in HPV carcinogenesisEJ~. Virus Res, 2002, 89(2) : 191 -199.
10Morcno V, Bosch FX, Muoz N, et al. Effect of oral contraceptives on risk of cervical cancer in women with human papillomavirus in- fection: the IARC multicentric case- control study [ J ]. Lancet, 2002, 359(9312) : 1085 - 1092.
