CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 2,2011, Pages 147-149, doi:10.3760/cma.j.issn.0529-567x.2011.02.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 2,2011, Pages 81-83, doi:10.3760/cma.j.issn.0529-567x.2011.02.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 2,2011, Pages 150-153, doi:10.3760/cma.j.issn.0529-567x.2011.02.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 2,2011, Pages 138-140, doi:10.3760/cma.j.issn.0529-567x.2011.02.014
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 2,2011, Pages 113-118, doi:10.3760/cma.j.issn.0529-567x.2011.02.008