Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 12,2015, Pages 890-893, doi:10.3760/cma.j.issn.0529-567x.2015.12.003
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 12,2015, Pages 954-956, doi:10.3760/cma.j.issn.0529-567x.2015.12.016
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 12,2015, Pages 931-936, doi:10.3760/cma.j.issn.0529-567x.2015.12.010
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 12,2015, Pages 949-953, doi:10.3760/cma.j.issn.0529-567x.2015.12.015
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 12,2015, Pages 915-922, doi:10.3760/cma.j.issn.0529-567x.2015.12.007