National Medical Journal of China, Volume 93, Issue 8,2013, Pages 597-599, doi:10.3760/cma.j.issn.0376-2491.2013.08.010
National Medical Journal of China, Volume 93, Issue 8,2013, Pages 638-639, doi:10.3760/cma.j.issn.0376-2491.2013.08.022
National Medical Journal of China, Volume 93, Issue 8,2013, Pages 634-636, doi:10.3760/cma.j.issn.0376-2491.2013.08.020
National Medical Journal of China, Volume 93, Issue 8,2013, Pages 594-596, doi:10.3760/cma.j.issn.0376-2491.2013.08.009