CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 03,2002, Pages 129-131, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 03,2002, Pages 132-133, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 03,2002, Pages 134-135, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 03,2002, Pages 136-138, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 03,2002, Pages 139-141, Dol: