CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 3,2008, Pages 166-170, doi:10.3321/j.issn:0529-567X.2008.03.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 3,2008, Pages 223-224, doi:10.3321/j.issn:0529-567X.2008.03.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 3,2008, Pages 175-179, doi:10.3321/j.issn:0529-567X.2008.03.005
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 3,2008, Pages 225-226, doi:10.3321/j.issn:0529-567X.2008.03.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 3,2008, Pages 189-192, doi:10.3321/j.issn:0529-567X.2008.03.008