CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 11,2007, Pages 721-722, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 11,2007, Pages 723-726, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 11,2007, Pages 727-729, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 11,2007, Pages 730-732, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 11,2007, Pages 733-736, Dol: