Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 625-631, doi:10.3760/cma.j.issn.1007-9408.2015.08.017
Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 582-585, doi:10.3760/cma.j.issn.1007-9408.2015.08.006
Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 586-588, doi:10.3760/cma.j.issn.1007-9408.2015.08.007
Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 561-567, doi:10.3760/cma.j.issn.1007-9408.2015.08.001
Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 606-609, doi:10.3760/cma.j.issn.1007-9408.2015.08.013