National Medical Journal of China, Volume 92, Issue 44,2012, Pages 3097-3099, doi:10.3760/cma.j.issn.0376-2491.2012.44.001
National Medical Journal of China, Volume 92, Issue 44,2012, Pages 3108-3112, doi:10.3760/cma.j.issn.0376-2491.2012.44.005
National Medical Journal of China, Volume 92, Issue 44,2012, Pages 3117-3121, doi:10.3760/cma.j.issn.0376-2491.2012.44.007
National Medical Journal of China, Volume 92, Issue 44,2012, Pages 3151-3154, doi:10.3760/cma.j.issn.0376-2491.2012.44.017
National Medical Journal of China, Volume 92, Issue 44,2012, Pages 3168, doi:10.3760/cma.j.issn.0376-2491.2012.44.023