Chinese Journal of Perinatal Medicine, Volume 22, Issue 1,2019, Pages 30-34, doi:10.3760/cma.j.issn.1007-9408.2019.01.007
Chinese Journal of Perinatal Medicine, Volume 22, Issue 1,2019, Pages 35-40, doi:10.3760/cma.j.issn.1007-9408.2019.01.008
Chinese Journal of Perinatal Medicine, Volume 22, Issue 1,2019, Pages 58-65, doi:10.3760/cma.j.issn.1007-9408.2019.01.013
Chinese Journal of Perinatal Medicine, Volume 22, Issue 1,2019, Pages 22-25, doi:10.3760/cma.j.issn.1007-9408.2019.01.005
Chinese Journal of Perinatal Medicine, Volume 22, Issue 1,2019, Pages 1, doi:10.3760/cma.j.issn.1007-9408.2019.01.001