CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 12,2005, Pages 799-802, doi:10.3760/j.issn:0529-567X.2005.12.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 12,2005, Pages 848-849, doi:10.3760/j.issn:0529-567X.2005.12.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 12,2005, Pages 850-851, doi:10.3760/j.issn:0529-567X.2005.12.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 12,2005, Pages 818-821, doi:10.3760/j.issn:0529-567X.2005.12.008
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 12,2005, Pages 822-825, doi:10.3760/j.issn:0529-567X.2005.12.009