Chinese Journal of Perinatal Medicine, Volume 16, Issue 5,2013, Pages 262-265, doi:10.3760/cma.j.issn.1007-9408.2013.05.002
Chinese Journal of Perinatal Medicine, Volume 16, Issue 5,2013, Pages 302-304, doi:10.3760/cma.j.issn.1007-9408.2013.05.011
Chinese Journal of Perinatal Medicine, Volume 16, Issue 5,2013, Pages 294-296, doi:10.3760/cma.j.issn.1007-9408.2013.05.008
Chinese Journal of Perinatal Medicine, Volume 16, Issue 5,2013, Pages 305-307, doi:10.3760/cma.j.issn.1007-9408.2013.05.012
Chinese Journal of Perinatal Medicine, Volume 16, Issue 5,2013, Pages 319-320, doi:10.3760/cma.j.issn.1007-9408.2013.05.016