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1 Transvaginal Sonography in Diagnosis of Incompetent Internal Os of Cercix
Kyung Soon Lee, Ji A Ryu, In Ok Song, Hye Won Chung, Jung Ja An, Young Soo Son, Eun Chul Chung, Bock Hi Woo
Ewha Med J.1993;16(2):145-153.   Published online 2015 July 24     DOI: http://dx.doi.org/10.12771/emj.1993.16.2.145
      

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