JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 25, Issue 7,2009, Pages 437-438, doi:10.3969/j.issn.1003-6946.2009.07.023
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JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 25, Issue 7,2009, Pages 386-388, doi:10.3969/j.issn.1003-6946.2009.07.002
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 25, Issue 7,2009, Pages 445-445, doi:10.3969/j.issn.1003-6946.2009.07.032
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 25, Issue 7,2009, Pages 402-404, doi:10.3969/j.issn.1003-6946.2009.07.010