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 606-609, doi:10.3760/cma.j.issn.1007-9408.2015.08.013
Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 610-615, doi:10.3760/cma.j.issn.1007-9408.2015.08.014
Chinese Journal of Perinatal Medicine, Volume 18, Issue 8,2015, Pages 582-585, doi:10.3760/cma.j.issn.1007-9408.2015.08.006