National Medical Journal of China, Volume 91, Issue 47,2011, Pages 3374-3376, doi:10.3760/cma.j.issn.0376-2491.2011.47.016
National Medical Journal of China, Volume 91, Issue 47,2011, Pages 3324-3328, doi:10.3760/cma.j.issn.0376-2491.2011.47.004
National Medical Journal of China, Volume 91, Issue 47,2011, Pages 3376, doi:10.3760/cma.j.issn.0376-2491.2011.47.017
National Medical Journal of China, Volume 91, Issue 47,2011, Pages 3358-3362, doi:10.3760/cma.j.issn.0376-2491.2011.47.012
National Medical Journal of China, Volume 91, Issue 47,2011, Pages 3384, doi:10.3760/cma.j.issn.0376-2491.2011.47.021