CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 10,2006, Pages 712-713, doi:10.3760/j.issn:0529-567X.2006.10.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 10,2006, Pages 672-675, doi:10.3760/j.issn:0529-567X.2006.10.007
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 10,2006, Pages 684-688, doi:10.3760/j.issn:0529-567X.2006.10.010
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 10,2006, Pages 714-714, doi:10.3760/j.issn:0529-567X.2006.10.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 10,2006, Pages 701-705, doi:10.3760/j.issn:0529-567X.2006.10.014