CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 6,2006, Pages 412, doi:10.3760/j.issn:0529-567X.2006.06.022
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 6,2006, Pages 387-390, doi:10.3760/j.issn:0529-567X.2006.06.008
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 6,2006, Pages 391-394, doi:10.3760/j.issn:0529-567X.2006.06.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 6,2006, Pages 399-402, doi:10.3760/j.issn:0529-567X.2006.06.011
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 6,2006, Pages 422-423, doi:10.3760/j.issn:0529-567X.2006.06.016