National Medical Journal of China, Volume 91, Issue 37,2011, Pages 2627-2629, doi:10.3760/cma.j.issn.0376-2491.2011.37.012
National Medical Journal of China, Volume 91, Issue 37,2011, Pages 2619-2622, doi:10.3760/cma.j.issn.0376-2491.2011.37.010
National Medical Journal of China, Volume 91, Issue 37,2011, Pages 2604-2606, doi:10.3760/cma.j.issn.0376-2491.2011.37.006
National Medical Journal of China, Volume 91, Issue 37,2011, Pages 2641-2643, doi:10.3760/cma.j.issn.0376-2491.2011.37.016
National Medical Journal of China, Volume 91, Issue 37,2011, Pages 2603, doi:10.3760/cma.j.issn.0376-2491.2011.37.005