National Medical Journal of China, Volume 91, Issue 34,2011, Pages 2442-2444, doi:10.3760/cma.j.issn.0376-2491.2011.34.019
National Medical Journal of China, Volume 91, Issue 34,2011, Pages 2427-2429, doi:10.3760/cma.j.issn.0376-2491.2011.34.014
National Medical Journal of China, Volume 91, Issue 34,2011, Pages 2380-2383, doi:10.3760/cma.j.issn.0376-2491.2011.34.002
National Medical Journal of China, Volume 91, Issue 34,2011, Pages 2402-2406, doi:10.3760/cma.j.issn.0376-2491.2011.34.007
National Medical Journal of China, Volume 91, Issue 34,2011, Pages 2430-2434, doi:10.3760/cma.j.issn.0376-2491.2011.34.016