CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 2,2007, Pages 142-144, doi:10.3760/j.issn:0529-567X.2007.02.021
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 2,2007, Pages 138-139, doi:10.3760/j.issn:0529-567X.2007.02.019
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 2,2007, Pages 102-106, doi:10.3760/j.issn:0529-567X.2007.02.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 2,2007, Pages 135-137, doi:10.3760/j.issn:0529-567X.2007.02.018
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 42, Issue 2,2007, Pages 79-82, doi:10.3760/j.issn:0529-567X.2007.02.003