Chinese Journal of Perinatal Medicine, Volume 21, Issue 11,2018, Pages 753-758, doi:10.3760/cma.j.issn.1007-9408.2018.11.007
Chinese Journal of Perinatal Medicine, Volume 21, Issue 11,2018, Pages 783-787, doi:10.3760/cma.j.issn.1007-9408.2018.11.015
Chinese Journal of Perinatal Medicine, Volume 21, Issue 11,2018, Pages 780-782, doi:10.3760/cma.j.issn.1007-9408.2018.11.014
Chinese Journal of Perinatal Medicine, Volume 21, Issue 11,2018, Pages 737-744, doi:10.3760/cma.j.issn.1007-9408.2018.11.004
Chinese Journal of Perinatal Medicine, Volume 21, Issue 11,2018, Pages 777-779, doi:10.3760/cma.j.issn.1007-9408.2018.11.013