National Medical Journal of China, Volume 91, Issue 41,2011, Pages 2917-2919, doi:10.3760/cma.j.issn.0376-2491.2011.41.011
National Medical Journal of China, Volume 91, Issue 41,2011, Pages 2947-2949, doi:10.3760/cma.j.issn.0376-2491.2011.41.019
National Medical Journal of China, Volume 91, Issue 41,2011, Pages 2951-2952, doi:10.3760/cma.j.issn.0376-2491.2011.41.021
National Medical Journal of China, Volume 91, Issue 41,2011, Pages 2912-2916, doi:10.3760/cma.j.issn.0376-2491.2011.41.010
National Medical Journal of China, Volume 91, Issue 41,2011, Pages 2935-2938, doi:10.3760/cma.j.issn.0376-2491.2011.41.016