CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 7,2002, Pages 429-430, doi:10.3760/j.issn:0529-567X.2002.07.022
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 7,2002, Pages 433-434, doi:10.3760/j.issn:0529-567X.2002.07.025
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 7,2002, Pages 405-407, doi:10.3760/j.issn:0529-567X.2002.07.007
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 7,2002, Pages 411-412, doi:10.3760/j.issn:0529-567X.2002.07.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 7,2002, Pages 417-418, doi:10.3760/j.issn:0529-567X.2002.07.013