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An epidemiological study on ectopic pregnancy associated with IUD. Zhang ZM,Weng Lj,Qiu SH,et al. Chinese Medical Journal . 1988
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Trends in ectopic pregnancies and use of intrauterine devices in Lombardy, Italy 1979--1983. Parazzini F,La Vecchia C,Fasoli M,et al. Contraception . 1988
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Incidence, trends and risks of ectopic pregnancy in a population of women. Westrom L,Bengtsson LPH,Mardh PA. British Medical Journal . 1981
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Ectopic pregnancy:a review of incidence, etiology and diagnostic aspects. Stabile I,Grudzinskas JG. Obstetrical and Gynecological Survey . 1990
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Ovarian pregnancy and the intrauterine device. Lehfeldt H,Tietze C,Gorstein F. American Journal of Obstetrics and Gynecology . 1970
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Contraception and ectopic pregnancy risk. Franks AL,Beral V,Cates W,et al. American Journal of Obstetrics and Gynecology . 1990
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Current perspectives of ectopic pregnancy. Weckstein LN. Obstetrical and Gynecological Survey . 1985
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Ectopic pregnancy and intrauterine contraceptive devices: new perspectives. Ory HW,Women Health’s Study. Obstetrics and Gynecology . 1981