CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 6,2005, Pages 388-391, doi:10.3760/j.issn:0529-567X.2005.06.009
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 6,2005, Pages 365-368, doi:10.3760/j.issn:0529-567X.2005.06.003
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 6,2005, Pages 426-428, doi:10.3760/j.issn:0529-567X.2005.06.020
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 6,2005, Pages 425-426, doi:10.3760/j.issn:0529-567X.2005.06.019
CHINESE JOURNAL OF OBSTETRICS AND GYNECOLOGY, Volume 40, Issue 6,2005, Pages 400-403, doi:10.3760/j.issn:0529-567X.2005.06.012