Chinese Journal of Perinatal Medicine, Volume 21, Issue 7,2018, Pages 465-471, doi:10.3760/cma.j.issn.1007-9408.2018.07.006
Chinese Journal of Perinatal Medicine, Volume 21, Issue 7,2018, Pages 499-501, doi:10.3760/cma.j.issn.1007-9408.2018.07.013
Chinese Journal of Perinatal Medicine, Volume 21, Issue 7,2018, Pages 446-457, doi:10.3760/cma.j.issn.1007-9408.2018.07.004
Chinese Journal of Perinatal Medicine, Volume 21, Issue 7,2018, Pages 479-482, doi:10.3760/cma.j.issn.1007-9408.2018.07.008
Chinese Journal of Perinatal Medicine, Volume 21, Issue 7,2018, Pages 435-441, doi:10.3760/cma.j.issn.1007-9408.2018.07.002