经腹与经阴道彩色多普勒超声在早期异位妊娠中的诊断价值的对比研究
경복여경음도채색다보륵초성재조기이위임신중적진단개치적대비연구
Diagnostic value of transabdominal and transvaginal color doppler ultrasound in the early diagnosis of ec-topic pregnancy
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