CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 6,2011, Pages 427-430, doi:10.3760/cma.j.issn.0529-567x.2011.06.008
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 6,2011, Pages 407-411, doi:10.3760/cma.j.issn.0529-567x.2011.06.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 6,2011, Pages 478-479, doi:10.3760/cma.j.issn.0529-567x.2011.06.024
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 6,2011, Pages 412-415, doi:10.3760/cma.j.issn.0529-567x.2011.06.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 6,2011, Pages 463-465, doi:10.3760/cma.j.issn.0529-567x.2011.06.018