CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 06,2008, Pages 401-404, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 06,2008, Pages 405-409, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 06,2008, Pages 410-413, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 06,2008, Pages 414-417, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 06,2008, Pages 418-421, Dol: