CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 1,2005, Pages 1-2, doi:10.3760/j.issn:0529-567X.2005.01.001
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CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 1,2005, Pages 52, doi:10.3760/j.issn:0529-567X.2005.01.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 1,2005, Pages 58-60, doi:10.3760/j.issn:0529-567X.2005.01.019
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 1,2005, Pages 17-20, doi:10.3760/j.issn:0529-567X.2005.01.006