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Obstet Gynecol. 2003 Oct;102(4):672.

Commentary on "Discriminatory hCG zone: its use in the sonographic evaluation for ectopic pregnancy". Kadar N, DeVore G, Romero R. Discriminatory hCG zone: its use in the sonographic evaluation for ectopic pregnancy. Obstet Gynecol 1981;58:156-61.

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PMID:
14550993
[Indexed for MEDLINE]

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