National Medical Journal of China, Volume 92, Issue 35,2012, Pages 2452-2455, doi:10.3760/cma.j.issn.0376-2491.2012.35.002
National Medical Journal of China, Volume 92, Issue 35,2012, Pages 2518-2520, doi:10.3760/cma.j.issn.0376-2491.2012.35.020
National Medical Journal of China, Volume 92, Issue 35,2012, Pages 2488-2490, doi:10.3760/cma.j.issn.0376-2491.2012.35.011
National Medical Journal of China, Volume 92, Issue 35,2012, Pages 2460-2462, doi:10.3760/cma.j.issn.0376-2491.2012.35.004
National Medical Journal of China, Volume 92, Issue 35,2012, Pages 2463-2467, doi:10.3760/cma.j.issn.0376-2491.2012.35.005