National Medical Journal of China, Volume 91, Issue 42,2011, Pages 3012-3015, doi:10.3760/cma.j.issn.0376-2491.2011.42.015
National Medical Journal of China, Volume 91, Issue 42,2011, Pages 2995-2998, doi:10.3760/cma.j.issn.0376-2491.2011.42.011
National Medical Journal of China, Volume 91, Issue 42,2011, Pages 2999-3002, doi:10.3760/cma.j.issn.0376-2491.2011.42.012
National Medical Journal of China, Volume 91, Issue 42,2011, Pages 3007-3011, doi:10.3760/cma.j.issn.0376-2491.2011.42.014
National Medical Journal of China, Volume 91, Issue 42,2011, Pages 2985-2989, doi:10.3760/cma.j.issn.0376-2491.2011.42.009