Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 12,2014, Pages 909-913, doi:10.3760/cma.j.issn.0529-567x.2014.12.006
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 12,2014, Pages 942-943, doi:10.3760/cma.j.issn.0529-567x.2014.12.014
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 12,2014, Pages 940, doi:10.3760/cma.j.issn.0529-567x.2014.12.012
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 12,2014, Pages 951-952, doi:10.3760/cma.j.issn.0529-567x.2014.12.017
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 12,2014, Pages 886-892, doi:10.3760/cma.j.issn.0529-567x.2014.12.002