CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 9,2010, Pages 703-705, doi:10.3760/cma.j.issn.0529-567x.2010.09.015
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 9,2010, Pages 712-714, doi:10.3760/cma.j.issn.0529-567x.2010.09.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 9,2010, Pages 677-681, doi:10.3760/cma.j.issn.0529-567x.2010.09.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 9,2010, Pages 706-709, doi:10.3760/cma.j.issn.0529-567x.2010.09.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 9,2010, Pages 669-672, doi:10.3760/cma.j.issn.0529-567x.2010.09.007