National Medical Journal of China, Volume 92, Issue 42,2012, Pages 2965-2967, doi:10.3760/cma.j.issn.0376-2491.2012.42.004
National Medical Journal of China, Volume 92, Issue 42,2012, Pages 2955-2960, doi:10.3760/cma.j.issn.0376-2491.2012.42.002
National Medical Journal of China, Volume 92, Issue 42,2012, Pages 3008-3011, doi:10.3760/cma.j.issn.0376-2491.2012.42.016
National Medical Journal of China, Volume 92, Issue 42,2012, Pages 2988-2991, doi:10.3760/cma.j.issn.0376-2491.2012.42.010
National Medical Journal of China, Volume 92, Issue 42,2012, Pages 2984-2987, doi:10.3760/cma.j.issn.0376-2491.2012.42.009