Chinese Journal of Perinatal Medicine, Volume 22, Issue 10,2019, Pages 740-743, doi:10.3760/cma.j.issn.1007-9408.2019.10.010
Chinese Journal of Perinatal Medicine, Volume 22, Issue 10,2019, Pages 735-739, doi:10.3760/cma.j.issn.1007-9408.2019.10.009
Chinese Journal of Perinatal Medicine, Volume 22, Issue 10,2019, Pages 757-760, doi:10.3760/cma.j.issn.1007-9408.2019.10.013
Chinese Journal of Perinatal Medicine, Volume 22, Issue 10,2019, Pages 698-703, doi:10.3760/cma.j.issn.1007-9408.2019.10.004