National Medical Journal of China, Volume 93, Issue 2,2013, Pages 99-103, doi:10.3760/cma.j.issn.0376-2491.2013.02.006
National Medical Journal of China, Volume 93, Issue 2,2013, Pages 114-118, doi:10.3760/cma.j.issn.0376-2491.2013.02.009
National Medical Journal of China, Volume 93, Issue 2,2013, Pages 128-131, doi:10.3760/cma.j.issn.0376-2491.2013.02.012
National Medical Journal of China, Volume 93, Issue 2,2013, Pages 81-83, doi:10.3760/cma.j.issn.0376-2491.2013.02.001
National Medical Journal of China, Volume 93, Issue 2,2013, Pages 132-134, doi:10.3760/cma.j.issn.0376-2491.2013.02.013