Chinese Journal of Perinatal Medicine, Volume 22, Issue 12,2019, Pages 833-837, doi:10.3760/cma.j.issn.1007-9408.2019.12.001
Chinese Journal of Perinatal Medicine, Volume 22, Issue 12,2019, Pages 891-893, doi:10.3760/cma.j.issn.1007-9408.2019.12.010
Chinese Journal of Perinatal Medicine, Volume 22, Issue 12,2019, Pages 878-884, doi:10.3760/cma.j.issn.1007-9408.2019.12.008
Chinese Journal of Perinatal Medicine, Volume 22, Issue 12,2019, Pages 838-843, doi:10.3760/cma.j.issn.1007-9408.2019.12.002
Chinese Journal of Perinatal Medicine, Volume 22, Issue 12,2019, Pages 844-848, doi:10.3760/cma.j.issn.1007-9408.2019.12.003