CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 05,2001, Pages 261-263, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 05,2001, Pages 264-266, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 05,2001, Pages 267-270, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 05,2001, Pages 271-274, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 36, Issue 05,2001, Pages 275-277, Dol: