CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 05,2004, Pages 289-291, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 05,2004, Pages 292-295, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 05,2004, Pages 296-300, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 05,2004, Pages 301-304, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 05,2004, Pages 305-307, Dol: