Chinese Journal of Perinatal Medicine, Volume 21, Issue 2,2018, Pages 109-111, doi:10.3760/cma.j.issn.1007-9408.2018.02.008
Chinese Journal of Perinatal Medicine, Volume 21, Issue 2,2018, Pages 84-86, doi:10.3760/cma.j.issn.1007-9408.2018.02.003
Chinese Journal of Perinatal Medicine, Volume 21, Issue 2,2018, Pages 130-133, doi:10.3760/cma.j.issn.1007-9408.2018.02.013
Chinese Journal of Perinatal Medicine, Volume 21, Issue 2,2018, Pages 87-89, doi:10.3760/cma.j.issn.1007-9408.2018.02.004
Chinese Journal of Perinatal Medicine, Volume 21, Issue 2,2018, Pages 126-129, doi:10.3760/cma.j.issn.1007-9408.2018.02.012