Publisher： John Wiley & Sons Inc
E-ISSN： 1471-0528|122|3|277-281
ISSN： 1470-0328
Source： BJOG : AN INTERNATIONAL JOURNAL OF OBSTETRICS & GYNAECOLOGY, Vol.122, Iss.3, 2015-02, pp. : 277-281
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
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