CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 9,2004, Pages 597, doi:10.3760/j.issn:0529-567X.2004.09.028
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 9,2004, Pages 602-605, doi:10.3760/j.issn:0529-567X.2004.09.008
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 9,2004, Pages 577-578, doi:10.3760/j.issn:0529-567X.2004.09.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 9,2004, Pages 591-594, doi:10.3760/j.issn:0529-567X.2004.09.005
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 9,2004, Pages 634-635, doi:10.3760/j.issn:0529-567X.2004.09.019