CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 09,2009, Pages 641-642, Dol:10.3760/cma.j.issn.0529-567x.2009.09.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 09,2009, Pages 643-646, Dol:10.3760/cma.j.issn.0529-567x.2009.09.002
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 09,2009, Pages 647-649, Dol:10.3760/cma.j.issn.0529-567x.2009.09.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 09,2009, Pages 650-654, Dol:10.3760/cma.j.issn.0529-567x.2009.09.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 44, Issue 09,2009, Pages 655-657, Dol:10.3760/cma.j.issn.0529-567x.2009.09.005