CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 7,2010, Pages 553-555, doi:10.3760/cma.j.issn.0529-567x.2010.07.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 7,2010, Pages 541-543, doi:10.3760/cma.j.issn.0529-567x.2010.07.016
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 7,2010, Pages 506-510, doi:10.3760/cma.j.issn.0529-567x.2010.07.006
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 45, Issue 7,2010, Pages 534-535, doi:10.3760/cma.j.issn.0529-567x.2010.07.013