National Medical Journal of China, Volume 91, Issue 35,2011, Pages 2463, doi:10.3760/cma.j.issn.0376-2491.2011.35.005
National Medical Journal of China, Volume 91, Issue 35,2011, Pages 2468-2471, doi:10.3760/cma.j.issn.0376-2491.2011.35.007
National Medical Journal of China, Volume 91, Issue 35,2011, Pages 2453-2455, doi:10.3760/cma.j.issn.0376-2491.2011.35.002
National Medical Journal of China, Volume 91, Issue 35,2011, Pages 2472-2475, doi:10.3760/cma.j.issn.0376-2491.2011.35.008
National Medical Journal of China, Volume 91, Issue 35,2011, Pages 2449-2452, doi:10.3760/cma.j.issn.0376-2491.2011.35.001