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Am J Obstet Gynecol. 2017 Sep;217(3):380-381. doi: 10.1016/j.ajog.2017.05.010. Epub 2017 May 11.

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Author information

1
Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China.
2
Department of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China. Electronic address: yanghuixia@bjmu.edu.cn.
PMID:
28502756
DOI:
10.1016/j.ajog.2017.05.010

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