Publisher： John Wiley & Sons Inc
E-ISSN： 1471-0528|122|4|453-457
ISSN： 1470-0328
Source： BJOG : AN INTERNATIONAL JOURNAL OF OBSTETRICS & GYNAECOLOGY, Vol.122, Iss.4, 2015-03, pp. : 453-457
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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