5Ville Y, et al. The role of chlamydia trachomatis and neisseria gonorrhoeae in the aetiology of ectopic preguancy in Gabon. Br J Obstet Gynecol, 1991,98:1260
6Maccato M. et al. Prevalence of active chlamydia trachomatis infection at the time of exploratory laparotomy or ectopic preguancy. Obstet Gynecol, 1992, 29: 211