Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 11,2017, Pages 784, doi:10.3760/cma.j.issn.0529-567x.2017.11.015
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 11,2017, Pages 785-788, doi:10.3760/cma.j.issn.0529-567x.2017.11.016
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 11,2017, Pages 779-781, doi:10.3760/cma.j.issn.0529-567x.2017.11.012
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 11,2017, Pages 789-792, doi:10.3760/cma.j.issn.0529-567x.2017.11.017
Chinese Journal of Obstetrics and Gynecology, Volume 52, Issue 11,2017, Pages 740-744, doi:10.3760/cma.j.issn.0529-567x.2017.11.005