National Medical Journal of China, Volume 92, Issue 30,2012, Pages 2144-2147, doi:10.3760/cma.j.issn.0376-2491.2012.30.015
National Medical Journal of China, Volume 92, Issue 30,2012, Pages 2104-2107, doi:10.3760/cma.j.issn.0376-2491.2012.30.006
National Medical Journal of China, Volume 92, Issue 30,2012, Pages 2128-2130, doi:10.3760/cma.j.issn.0376-2491.2012.30.011
National Medical Journal of China, Volume 92, Issue 30,2012, Pages 2151-2153, doi:10.3760/cma.j.issn.0376-2491.2012.30.017
National Medical Journal of China, Volume 92, Issue 30,2012, Pages 2157-2159, doi:10.3760/cma.j.issn.0376-2491.2012.30.019