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Transvaginal sonography as the ultimate diagnostic tool for the mamagement of ectopic pregnancy:experience with 840 cases. Eliezer S,Ilan Y,Moshe B,et al. Fertility and Sterility . 1998
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Diagnosis of ectopic pregnancy with endovaginal color Doppler US. Brown DL. Radiology . 1993
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Early diagnosis of tubal pregnancy: changes in tubal blood flow evaluated by endovaginal color Doppler sonography. Kirchler HC,Seebacher S,Alge AA,et al. Obstetrics and Gynecology . 1993
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Early detection of ectopic pregnancy visualizing the presence of a tubal ring with ultrasonography performed by emergency physicians. Thoma ME. American Journal of Emergency Medicine . 2000
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Emergency department screening for ectopic pregnancy: a prospective US study. Barvara HB,Beverly GC,Parvati R,et al. Radiology . 1994
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Ectopic pregnancy: features at transvaginal sonography. Arthur CF,Rbecca GP,Mary SM,et al. Radiology . 1990
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Diagnosing ectopic pregnancy: decision analysis comparing six strategies. Gracia Cr,Barnhart KT. Obstetrics and Gynecology . 2001
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Role of transvaginal ultrasonography in the diagnosis of ectopic pregnancy. Mol BW,Van der Veen F. Fertility and Sterility . 1998