CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 05,2011, Pages 321-323, Dol:10.3760/cma.j.issn.0529-567x.2011.05.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 05,2011, Pages 324-328, Dol:10.3760/cma.j.issn.0529-567x.2011.05.002
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 05,2011, Pages 329-332, Dol:10.3760/cma.j.issn.0529-567x.2011.05.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 05,2011, Pages 333-337, Dol:10.3760/cma.j.issn.0529-567x.2011.05.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 46, Issue 05,2011, Pages 338-341, Dol:10.3760/cma.j.issn.0529-567x.2011.05.005