Chinese Journal of Perinatal Medicine, Volume 20, Issue 8,2017, Pages 596-599, doi:10.3760/cma.j.issn.1007-9408.2017.08.011
Chinese Journal of Perinatal Medicine, Volume 20, Issue 8,2017, Pages 607-610, doi:10.3760/cma.j.issn.1007-9408.2017.08.014
Chinese Journal of Perinatal Medicine, Volume 20, Issue 8,2017, Pages 600-603, doi:10.3760/cma.j.issn.1007-9408.2017.08.012
Chinese Journal of Perinatal Medicine, Volume 20, Issue 8,2017, Pages 560-563, doi:10.3760/cma.j.issn.1007-9408.2017.08.003
Chinese Journal of Perinatal Medicine, Volume 20, Issue 8,2017, Pages 568-570, doi:10.3760/cma.j.issn.1007-9408.2017.08.005