CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 08,2004, Pages 505-507, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 08,2004, Pages 508-510, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 08,2004, Pages 511-514, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 08,2004, Pages 515-518, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 08,2004, Pages 519-521, Dol: