National Medical Journal of China, Volume 92, Issue 41,2012, Pages 2924-2926, doi:10.3760/cma.j.issn.0376-2491.2012.41.012
National Medical Journal of China, Volume 92, Issue 41,2012, Pages 2901-2904, doi:10.3760/cma.j.issn.0376-2491.2012.41.006
National Medical Journal of China, Volume 92, Issue 41,2012, Pages 2918-2920, doi:10.3760/cma.j.issn.0376-2491.2012.41.010
National Medical Journal of China, Volume 92, Issue 41,2012, Pages 2949-2950, doi:10.3760/cma.j.issn.0376-2491.2012.41.020
National Medical Journal of China, Volume 92, Issue 41,2012, Pages 2946-2948, doi:10.3760/cma.j.issn.0376-2491.2012.41.018