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JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 9,2006, Pages 530-530, doi:10.3969/j.issn.1003-6946.2006.09.032
JOURNAL OF PRACTICAL OBSTETRICS AND GYNECOLOGY, Volume 22, Issue 9,2006, Pages 548-549, doi:10.3969/j.issn.1003-6946.2006.09.024