Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 12,2013, Pages 911-915, doi:10.3760/cma.j.issn.0529-567x.2013.12.008
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 12,2013, Pages 899-902, doi:10.3760/cma.j.issn.0529-567x.2013.12.005
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 12,2013, Pages 945-946, doi:10.3760/cma.j.issn.0529-567x.2013.12.017
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 12,2013, Pages 896-898, doi:10.3760/cma.j.issn.0529-567x.2013.12.004
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 12,2013, Pages 925-928, doi:10.3760/cma.j.issn.0529-567x.2013.12.011