CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 02,2008, Pages 81-84, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 02,2008, Pages 85-89, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 02,2008, Pages 90-93, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 02,2008, Pages 94-97, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 02,2008, Pages 98-101, Dol: