CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 4,2010, Pages 300-302, doi:10.3760/cma.j.issn.0529-567x.2010.04.015
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 4,2010, Pages 298-299, doi:10.3760/cma.j.issn.0529-567x.2010.04.014
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 4,2010, Pages 305-306, doi:10.3760/cma.j.issn.0529-567x.2010.04.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 4,2010, Pages 273-277, doi:10.3760/cma.j.issn.0529-567x.2010.04.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 4,2010, Pages 260-263, doi:10.3760/cma.j.issn.0529-567x.2010.04.006