Chinese Journal of Perinatal Medicine, Volume 20, Issue 4,2017, Pages 249-255, doi:10.3760/cma.j.issn.1007-9408.2017.04.003
Chinese Journal of Perinatal Medicine, Volume 20, Issue 4,2017, Pages 268-273, doi:10.3760/cma.j.issn.1007-9408.2017.04.006
Chinese Journal of Perinatal Medicine, Volume 20, Issue 4,2017, Pages 306-307, doi:10.3760/cma.j.issn.1007-9408.2017.04.014
Chinese Journal of Perinatal Medicine, Volume 20, Issue 4,2017, Pages 308-311, doi:10.3760/cma.j.issn.1007-9408.2017.04.015
Chinese Journal of Perinatal Medicine, Volume 20, Issue 4,2017, Pages 290-294, doi:10.3760/cma.j.issn.1007-9408.2017.04.010