CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 12,2002, Pages 705-707, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 12,2002, Pages 708-711, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 12,2002, Pages 712-714, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 12,2002, Pages 715-717, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 12,2002, Pages 718-720, Dol: