Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 612-617, doi:10.3760/cma.j.issn.1007-9408.2011.10.008
Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 583-586, doi:10.3760/cma.j.issn.1007-9408.2011.10.002
Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 638-639, doi:10.3760/cma.j.issn.1007-9408.2011.10.014
Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 630-632, doi:10.3760/cma.j.issn.1007-9408.2011.10.012
Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 633-637, doi:10.3760/cma.j.issn.1007-9408.2011.10.013