CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 4,2011, Pages 288-291, doi:10.3760/cma.j.issn.0529-567x.2011.04.013
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 4,2011, Pages 304-306, doi:10.3760/cma.j.issn.0529-567x.2011.04.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 4,2011, Pages 311-313, doi:10.3760/cma.j.issn.0529-567x.2011.04.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 4,2011, Pages 266-270, doi:10.3760/cma.j.issn.0529-567x.2011.04.006
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 4,2011, Pages 301-303, doi:10.3760/cma.j.issn.0529-567x.2011.04.017