Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 5,2013, Pages 391-393, doi:10.3760/cma.j.issn.0529-567x.2013.05.018
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 5,2013, Pages 321-325, doi:10.3760/cma.j.issn.0529-567x.2013.05.001
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 5,2013, Pages 377-378, doi:10.3760/cma.j.issn.0529-567x.2013.05.013
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 5,2013, Pages 344-347, doi:10.3760/cma.j.issn.0529-567x.2013.05.006
Chinese Journal of Obstetrics and Gynecology, Volume 48, Issue 5,2013, Pages 397, doi:10.3760/cma.j.issn.0529-567x.2013.05.020