CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 500, doi:10.3760/j.issn:0529-567X.2006.07.025
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 440-444, doi:10.3760/j.issn:0529-567X.2006.07.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 455-458, doi:10.3760/j.issn:0529-567X.2006.07.007
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 492-494, doi:10.3760/j.issn:0529-567X.2006.07.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 452-454, doi:10.3760/j.issn:0529-567X.2006.07.006