Chinese Journal of Perinatal Medicine, Volume 17, Issue 11,2014, Pages 778-780, doi:10.3760/cma.j.issn.1007-9408.2014.11.014
Chinese Journal of Perinatal Medicine, Volume 17, Issue 11,2014, Pages 764-766, doi:10.3760/cma.j.issn.1007-9408.2014.11.010
Chinese Journal of Perinatal Medicine, Volume 17, Issue 11,2014, Pages 781-785, doi:10.3760/cma.j.issn.1007-9408.2014.11.015
Chinese Journal of Perinatal Medicine, Volume 17, Issue 11,2014, Pages 766-770, doi:10.3760/cma.j.issn.1007-9408.2014.11.011
Chinese Journal of Perinatal Medicine, Volume 17, Issue 11,2014, Pages 760-763, doi:10.3760/cma.j.issn.1007-9408.2014.11.009