National Medical Journal of China, Volume 91, Issue 45,2011, Pages 3235-3237, doi:10.3760/cma.j.issn.0376-2491.2011.45.020
National Medical Journal of China, Volume 91, Issue 45,2011, Pages 3219-3222, doi:10.3760/cma.j.issn.0376-2491.2011.45.014
National Medical Journal of China, Volume 91, Issue 45,2011, Pages 3176-3178, doi:10.3760/cma.j.issn.0376-2491.2011.45.003
National Medical Journal of China, Volume 91, Issue 45,2011, Pages 3172-3175, doi:10.3760/cma.j.issn.0376-2491.2011.45.002
National Medical Journal of China, Volume 91, Issue 45,2011, Pages 3225-3228, doi:10.3760/cma.j.issn.0376-2491.2011.45.016