CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 02,2007, Pages 73-75, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 02,2007, Pages 76-78, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 02,2007, Pages 79-82, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 02,2007, Pages 83-86, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 02,2007, Pages 87-91, Dol: