CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 2,2004, Pages 86-90, doi:10.3760/j.issn:0529-567X.2004.02.005
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 2,2004, Pages 83-85, doi:10.3760/j.issn:0529-567X.2004.02.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 2,2004, Pages 108-111, doi:10.3760/j.issn:0529-567X.2004.02.011
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 2,2004, Pages 123-124, doi:10.3760/j.issn:0529-567X.2004.02.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 2,2004, Pages 120-120, doi:10.3760/j.issn:0529-567X.2004.02.015