2Parish WL, Laumann EO, Cohen MS et al.Population -based study of chlamydial infection in China: a hidden epidemic. JAMA, 2003, 289: 1265
3Ault KA. Epidemlology and natural history of human papillomavlms infections in the female genital tract. Infect Dis Obstet Gynecol, 2006, 14 (1): 40
4ManhartLE, Koutsky LA. Do condoms prevent genital HPV infection,external genital warts, or cervical neoplasia? A meta analysis. Sexually Transmitted Diseases, 2002, 29 ( 11 ) : 725
5Hogewoning C J, Bleeker MC, van den Brule AJ et al. Condom use promotes regression of cervical intraepithelial neoplasia and clearance of human papillomavirus: a randomized clinical trial International Journal of Cancer, 2003, 107 (5): 811
6Andrist LC. Vaginal health and infections. J Obstet Gynecol Neonatal Nuts, 2001, 30:303
