Chinese Journal of Perinatal Medicine, Volume 21, Issue 5,2018, Pages 322-328, doi:10.3760/cma.j.issn.1007-9408.2018.05.009
Chinese Journal of Perinatal Medicine, Volume 21, Issue 5,2018, Pages 301-306, doi:10.3760/cma.j.issn.1007-9408.2018.05.005
Chinese Journal of Perinatal Medicine, Volume 21, Issue 5,2018, Pages 357, doi:10.3760/cma.j.issn.1007-9408.2018.05.017
Chinese Journal of Perinatal Medicine, Volume 21, Issue 5,2018, Pages 340-342, doi:10.3760/cma.j.issn.1007-9408.2018.05.013
Chinese Journal of Perinatal Medicine, Volume 21, Issue 5,2018, Pages 359-360, doi:10.3760/cma.j.issn.1007-9408.2018.05.019