Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 5,2014, Pages 341-347, doi:10.3760/cma.j.issn.0529-567x.2014.05.005
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 5,2014, Pages 395-397, doi:10.3760/cma.j.issn.0529-567x.2014.05.019
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 5,2014, Pages 384, doi:10.3760/cma.j.issn.0529-567x.2014.05.015
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 5,2014, Pages 366-368, doi:10.3760/cma.j.issn.0529-567x.2014.05.009
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 5,2014, Pages 325-330, doi:10.3760/cma.j.issn.0529-567x.2014.05.002