CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 8,2005, Pages 553-557, doi:10.3760/j.issn:0529-567X.2005.08.013
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 8,2005, Pages 507, doi:10.3760/j.issn:0529-567X.2005.08.022
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 8,2005, Pages 536-538, doi:10.3760/j.issn:0529-567X.2005.08.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 8,2005, Pages 532-535, doi:10.3760/j.issn:0529-567X.2005.08.008
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 8,2005, Pages 511-515, doi:10.3760/j.issn:0529-567X.2005.08.003