CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 854-855, doi:10.3760/j.issn:0529-567X.2004.12.026
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 824-825, doi:10.3760/j.issn:0529-567X.2004.12.011
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 793-796, doi:10.3760/j.issn:0529-567X.2004.12.001
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 821-822, doi:10.3760/j.issn:0529-567X.2004.12.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 39, Issue 12,2004, Pages 809-812, doi:10.3760/j.issn:0529-567X.2004.12.005