CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 06,2007, Pages 361-362, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 06,2007, Pages 363-365, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 06,2007, Pages 366-369, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 06,2007, Pages 370-373, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 06,2007, Pages 374-376, Dol: