
Correlation between High Risk of 21-Trisomy and Fetus Antenatal Ultrasonography in Pregnant Woman of Middle Gestational Period
HANG Gui-fang, XU Hao-qin, YU Ling, GAO Ya-qing
Correlation between High Risk of 21-Trisomy and Fetus Antenatal Ultrasonography in Pregnant Woman of Middle Gestational Period
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