CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 04,2009, Pages 241-245, Dol:10.3760/cma.j.issn.0529-567x.2009.04.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 04,2009, Pages 246-248, Dol:10.3760/cma.j.issn.0529-567x.2009.04.002
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 04,2009, Pages 249-252, Dol:10.3760/cma.j.issn.0529-567x.2009.04.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 04,2009, Pages 253-256, Dol:10.3760/cma.j.issn.0529-567x.2009.04.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 04,2009, Pages 257-259, Dol:10.3760/cma.j.issn.0529-567x.2009.04.005