Chinese Journal of Perinatal Medicine, Volume 16, Issue 12,2013, Pages 709-711, doi:10.3760/cma.j.issn.1007-9408.2013.12.002
Chinese Journal of Perinatal Medicine, Volume 16, Issue 12,2013, Pages 705-708, doi:10.3760/cma.j.issn.1007-9408.2013.12.001
Chinese Journal of Perinatal Medicine, Volume 16, Issue 12,2013, Pages 766-769, doi:10.3760/cma.j.issn.1007-9408.2013.12.016
Chinese Journal of Perinatal Medicine, Volume 16, Issue 12,2013, Pages 731-735, doi:10.3760/cma.j.issn.1007-9408.2013.12.008