CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 11,2008, Pages 801-804, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 11,2008, Pages 805-809, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 11,2008, Pages 810-813, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 11,2008, Pages 814-817, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 43, Issue 11,2008, Pages 818-823, Dol: