National Medical Journal of China, Volume 93, Issue 6,2013, Pages 422-427, doi:10.3760/cma.j.issn.0376-2491.2013.06.008
National Medical Journal of China, Volume 93, Issue 6,2013, Pages 405-406, doi:10.3760/cma.j.issn.0376-2491.2013.06.003
National Medical Journal of China, Volume 93, Issue 6,2013, Pages 428-431, doi:10.3760/cma.j.issn.0376-2491.2013.06.009
National Medical Journal of China, Volume 93, Issue 6,2013, Pages 415-418, doi:10.3760/cma.j.issn.0376-2491.2013.06.006
National Medical Journal of China, Volume 93, Issue 6,2013, Pages 449-451, doi:10.3760/cma.j.issn.0376-2491.2013.06.014