Chinese Journal of Perinatal Medicine, Volume 17, Issue 5,2014, Pages 323-328, doi:10.3760/cma.j.issn.1007-9408.2014.05.008
Chinese Journal of Perinatal Medicine, Volume 17, Issue 5,2014, Pages 337-341, doi:10.3760/cma.j.issn.1007-9408.2014.05.010
Chinese Journal of Perinatal Medicine, Volume 17, Issue 5,2014, Pages 293-297, doi:10.3760/cma.j.issn.1007-9408.2014.05.002
Chinese Journal of Perinatal Medicine, Volume 17, Issue 5,2014, Pages 329-336, doi:10.3760/cma.j.issn.1007-9408.2014.05.009
Chinese Journal of Perinatal Medicine, Volume 17, Issue 5,2014, Pages 347-350, doi:10.3760/cma.j.issn.1007-9408.2014.05.012