Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 3,2013, Pages 213-215, doi:10.3760/cma.j.issn.0529-567x.2013.03.014
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 3,2013, Pages 228-229, doi:10.3760/cma.j.issn.0529-567x.2013.03.019
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 3,2013, Pages 233-236, doi:10.3760/cma.j.issn.0529-567x.2013.03.021
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 3,2013, Pages 188-192, doi:10.3760/cma.j.issn.0529-567x.2013.03.007
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 3,2013, Pages 240, doi:10.3760/cma.j.issn.0529-567x.2013.03.023