CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 10,2001, Pages 592, doi:10.3760/j.issn:0529-567X.2001.10.025
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 10,2001, Pages 633-635, doi:10.3760/j.issn:0529-567X.2001.10.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 10,2001, Pages 593-595, doi:10.3760/j.issn:0529-567X.2001.10.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 10,2001, Pages 614-617, doi:10.3760/j.issn:0529-567X.2001.10.010
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 10,2001, Pages 603-605, doi:10.3760/j.issn:0529-567X.2001.10.007