Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 11,2015, Pages 868-870, doi:10.3760/cma.j.issn.0529-567x.2015.11.016
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 11,2015, Pages 878-880, doi:10.3760/cma.j.issn.0529-567x.2015.11.019
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 11,2015, Pages 863-864, doi:10.3760/cma.j.issn.0529-567x.2015.11.014
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 11,2015, Pages 843-847, doi:10.3760/cma.j.issn.0529-567x.2015.11.010
Chinese Journal of Obstetrics and Gynecology, Volume 50, Issue 11,2015, Pages 830-833, doi:10.3760/cma.j.issn.0529-567x.2015.11.007