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CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 7,2008, Pages 553-555, doi:10.3321/j.issn:0529-567X.2008.07.021
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 7,2008, Pages 481-482, doi:10.3321/j.issn:0529-567X.2008.07.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 7,2008, Pages 538-539, doi:10.3321/j.issn:0529-567X.2008.07.015
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 7,2008, Pages 518-522, doi:10.3321/j.issn:0529-567X.2008.07.011