CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 2,2010, Pages 118-123, doi:10.3760/cma.j.issn.0529-567x.2010.02.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 2,2010, Pages 109-113, doi:10.3760/cma.j.issn.0529-567x.2010.02.007
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 2,2010, Pages 151-152, doi:10.3760/cma.j.issn.0529-567x.2010.02.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 2,2010, Pages 104-108, doi:10.3760/cma.j.issn.0529-567x.2010.02.006
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 2,2010, Pages 145-147, doi:10.3760/cma.j.issn.0529-567x.2010.02.018