CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 07,2002, Pages 385-387, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 07,2002, Pages 388-390, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 07,2002, Pages 391-394, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 07,2002, Pages 395-397, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 07,2002, Pages 398-401, Dol: