Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 9,2014, Pages 676-680, doi:10.3760/cma.j.issn.0529-567x.2014.09.008
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 9,2014, Pages 713-716, doi:10.3760/cma.j.issn.0529-567x.2014.09.019
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 9,2014, Pages 705, doi:10.3760/cma.j.issn.0529-567x.2014.09.016
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 9,2014, Pages 681-684, doi:10.3760/cma.j.issn.0529-567x.2014.09.009
Chinese Journal of Obstetrics and Gynecology, Volume 49, Issue 9,2014, Pages 647-651, doi:10.3760/cma.j.issn.0529-567x.2014.09.002