Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 1,2013, Pages 65-67, doi:10.3760/cma.j.issn.0529-567x.2013.01.017
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 1,2013, Pages 6-10, doi:10.3760/cma.j.issn.0529-567x.2013.01.003
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 1,2013, Pages 70-71, doi:10.3760/cma.j.issn.0529-567x.2013.01.020
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 1,2013, Pages 29-33, doi:10.3760/cma.j.issn.0529-567x.2013.01.008
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 1,2013, Pages 68-69, doi:10.3760/cma.j.issn.0529-567x.2013.01.018