CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 11,2006, Pages 732-735, doi:10.3760/j.issn:0529-567X.2006.11.004
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 11,2006, Pages 752-755, doi:10.3760/j.issn:0529-567X.2006.11.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 11,2006, Pages 776-778, doi:10.3760/j.issn:0529-567X.2006.11.017
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 11,2006, Pages 783-784, doi:10.3760/j.issn:0529-567X.2006.11.019
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 41, Issue 11,2006, Pages 749-751, doi:10.3760/j.issn:0529-567X.2006.11.008