CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 641-642, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 643-645, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 646-649, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 650-652, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 11,2002, Pages 653-655, Dol: