CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 4,2008, Pages 290-291, doi:10.3321/j.issn:0529-567X.2008.04.014
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 4,2008, Pages 297-299, doi:10.3321/j.issn:0529-567X.2008.04.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 4,2008, Pages 262-265, doi:10.3321/j.issn:0529-567X.2008.04.007
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 4,2008, Pages 269-271, doi:10.3321/j.issn:0529-567X.2008.04.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 4,2008, Pages 320, doi:10.3321/j.issn:0529-567X.2008.04.026