Chinese Journal of Perinatal Medicine, Volume 20, Issue 9,2017, Pages 640-643, doi:10.3760/cma.j.issn.1007-9408.2017.09.005
Chinese Journal of Perinatal Medicine, Volume 20, Issue 9,2017, Pages 665-668, doi:10.3760/cma.j.issn.1007-9408.2017.09.010
Chinese Journal of Perinatal Medicine, Volume 20, Issue 9,2017, Pages 679-683, doi:10.3760/cma.j.issn.1007-9408.2017.09.012
Chinese Journal of Perinatal Medicine, Volume 20, Issue 9,2017, Pages 695, doi:10.3760/cma.j.issn.1007-9408.2017.09.107
Chinese Journal of Perinatal Medicine, Volume 20, Issue 9,2017, Pages 693-694, doi:10.3760/cma.j.issn.1007-9408.2017.09.106