共 2 条
[1]
Risk factors for ectopic pregnancy: an Italian case control study. Parazzini F,Tozzo L,Ferraroni M,et al. Obstetrics and Gynecology . 1992
[2]
Previous surgery,Reproduction factors and risk of eetopic pregnancy: a ease controlled study. Michalas S,Minaretzis D,Tsionou CH,et al. International Journal of Gynecology and Obstetrics . 1992