2013-08-01
作者：the American College of Obstetricians and Gynecologists，409,12th street，SW,PO box 92960，Washington DC 20090-6920 译者：洪琴 审核：程艳香
来源：Practice Bulletin No.110. American College of Obstetricians and Gynecologists.Obstet Gynecol 2010；115：206-18
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