Chinese Journal of Perinatal Medicine, Volume 21, Issue 10,2018, Pages 657-661, doi:10.3760/cma.j.issn.1007-9408.2018.10.003
Chinese Journal of Perinatal Medicine, Volume 21, Issue 10,2018, Pages 652-656, doi:10.3760/cma.j.issn.1007-9408.2018.10.002
Chinese Journal of Perinatal Medicine, Volume 21, Issue 10,2018, Pages 673-677, doi:10.3760/cma.j.issn.1007-9408.2018.10.006
Chinese Journal of Perinatal Medicine, Volume 21, Issue 10,2018, Pages 706-711, doi:10.3760/cma.j.issn.1007-9408.2018.10.012
Chinese Journal of Perinatal Medicine, Volume 21, Issue 10,2018, Pages 668-672, doi:10.3760/cma.j.issn.1007-9408.2018.10.005