CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 09,2008, Pages 641-642, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 09,2008, Pages 643-646, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 09,2008, Pages 647-650, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 09,2008, Pages 651-656, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 09,2008, Pages 657-661, Dol: