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 440-444, doi:10.3760/j.issn:0529-567X.2006.07.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 476-477, doi:10.3760/j.issn:0529-567X.2006.07.012
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 485-486, doi:10.3760/j.issn:0529-567X.2006.07.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 7,2006, Pages 459-463, doi:10.3760/j.issn:0529-567X.2006.07.008