CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 10,2004, Pages 698-699, doi:10.3760/j.issn:0529-567X.2004.10.014
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 10,2004, Pages 717-720, doi:10.3760/j.issn:0529-567X.2004.10.023
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 10,2004, Pages 682-686, doi:10.3760/j.issn:0529-567X.2004.10.010
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 10,2004, Pages 693-697, doi:10.3760/j.issn:0529-567X.2004.10.013
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 10,2004, Pages 666-668, doi:10.3760/j.issn:0529-567X.2004.10.006