CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 6,2008, Pages 474, doi:10.3321/j.issn:0529-567X.2008.06.024
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 6,2008, Pages 414-417, doi:10.3321/j.issn:0529-567X.2008.06.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 6,2008, Pages 475-477, doi:10.3321/j.issn:0529-567X.2008.06.025
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 6,2008, Pages 478-480, doi:10.3321/j.issn:0529-567X.2008.06.026