National Medical Journal of China, Volume 91, Issue 39,2011, Pages 2765-2768, doi:10.3760/cma.j.issn.0376-2491.2011.39.009
National Medical Journal of China, Volume 91, Issue 39,2011, Pages 2779-2781, doi:10.3760/cma.j.issn.0376-2491.2011.39.013
National Medical Journal of China, Volume 91, Issue 39,2011, Pages 2782-2784, doi:10.3760/cma.j.issn.0376-2491.2011.39.014
National Medical Journal of China, Volume 91, Issue 39,2011, Pages 2737-2739, doi:10.3760/cma.j.issn.0376-2491.2011.39.001
National Medical Journal of China, Volume 91, Issue 39,2011, Pages 2749-2752, doi:10.3760/cma.j.issn.0376-2491.2011.39.005