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 608-611, doi:10.3760/cma.j.issn.1007-9408.2011.10.007
Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 598-602, doi:10.3760/cma.j.issn.1007-9408.2011.10.005
Chinese Journal of Perinatal Medicine, Volume 14, Issue 10,2011, Pages 633-637, doi:10.3760/cma.j.issn.1007-9408.2011.10.013