CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 08,2001, Pages 453-455, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 08,2001, Pages 456-459, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 08,2001, Pages 460-461, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 08,2001, Pages 462-464, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 08,2001, Pages 465-467, Dol: