CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 04,2008, Pages 247-250, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 04,2008, Pages 251-253, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 04,2008, Pages 254-256, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 04,2008, Pages 257-261, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 04,2008, Pages 262-265, Dol: