Chinese Journal of Perinatal Medicine, Volume 21, Issue 12,2018, Pages 855-856, doi:10.3760/cma.j.issn.1007-9408.2018.12.014
Chinese Journal of Perinatal Medicine, Volume 21, Issue 12,2018, Pages 861, doi:10.3760/cma.j.issn.1007-9408.2018.12.017
Chinese Journal of Perinatal Medicine, Volume 21, Issue 12,2018, Pages 856-858, doi:10.3760/cma.j.issn.1007-9408.2018.12.015
Chinese Journal of Perinatal Medicine, Volume 21, Issue 12,2018, Pages 846-849, doi:10.3760/cma.j.issn.1007-9408.2018.12.012
Chinese Journal of Perinatal Medicine, Volume 21, Issue 12,2018, Pages 808-816, doi:10.3760/cma.j.issn.1007-9408.2018.12.004