JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 12,2007, Pages 749-750, doi:10.3969/j.issn.1003-6946.2007.12.018
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JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 12,2007, Pages 714-716, doi:10.3969/j.issn.1003-6946.2007.12.004
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 12,2007, Pages 709-710, doi:10.3969/j.issn.1003-6946.2007.12.001
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 23, Issue 12,2007, Pages 737-739, doi:10.3969/j.issn.1003-6946.2007.12.014