CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 03,2007, Pages 145-147, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 03,2007, Pages 148-151, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 03,2007, Pages 152-156, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 03,2007, Pages 157-160, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 03,2007, Pages 161-164, Dol: