National Medical Journal of China, Volume 92, Issue 6,2012, Pages 361-362, doi:10.3760/cma.j.issn.0376-2491.2012.06.001
National Medical Journal of China, Volume 92, Issue 6,2012, Pages 408-410, doi:10.3760/cma.j.issn.0376-2491.2012.06.014
National Medical Journal of China, Volume 92, Issue 6,2012, Pages 426-428, doi:10.3760/cma.j.issn.0376-2491.2012.06.019
National Medical Journal of China, Volume 92, Issue 6,2012, Pages 363-365, doi:10.3760/cma.j.issn.0376-2491.2012.06.002
National Medical Journal of China, Volume 92, Issue 6,2012, Pages 388-391, doi:10.3760/cma.j.issn.0376-2491.2012.06.009