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20例21-三体胎儿产前超声表现分析
赵凡桂1,张月萍2,任芸芸1,孔凡斌1△
Prenatal ultrasonographic findings in 20 fetuses with trisomy 21
ZHAO Fan-gui1, ZHANG Yue-ping2, REN Yun-yun1, KONG Fan-bin1△
复旦学报(医学版) . 2014, (06): 795 -797 .  DOI: 10.3969/j.issn.16728467.2014.06.014