CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 10,2002, Pages 577-579, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 10,2002, Pages 580-583, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 10,2002, Pages 584-587, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 10,2002, Pages 588-590, Dol:
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 37, Issue 10,2002, Pages 591-594, Dol: