National Medical Journal of China, Volume 91, Issue 43,2011, Pages 3050-3053, doi:10.3760/cma.j.issn.0376-2491.2011.43.007
National Medical Journal of China, Volume 91, Issue 43,2011, Pages 3028-3029, doi:10.3760/cma.j.issn.0376-2491.2011.43.002
National Medical Journal of China, Volume 91, Issue 43,2011, Pages 3074-3076, doi:10.3760/cma.j.issn.0376-2491.2011.43.013
National Medical Journal of China, Volume 91, Issue 43,2011, Pages 3058-3061, doi:10.3760/cma.j.issn.0376-2491.2011.43.009
National Medical Journal of China, Volume 91, Issue 43,2011, Pages 3030-3033, doi:10.3760/cma.j.issn.0376-2491.2011.43.003