CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 07,2007, Pages 433, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 07,2007, Pages 434-437, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 07,2007, Pages 438-442, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 07,2007, Pages 443-447, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 07,2007, Pages 448-452, Dol: