CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 3,2001, Pages 176-177, doi:10.3760/j.issn:0529-567X.2001.03.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 3,2001, Pages 173-174, doi:10.3760/j.issn:0529-567X.2001.03.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 3,2001, Pages 190-191, doi:10.3760/j.issn:0529-567X.2001.03.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 3,2001, Pages 153-155, doi:10.3760/j.issn:0529-567X.2001.03.007
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 3,2001, Pages 146-149, doi:10.3760/j.issn:0529-567X.2001.03.005