National Medical Journal of China, Volume 92, Issue 2,2012, Pages 142-143, doi:10.3760/cma.j.issn.0376-2491.2012.02.021
National Medical Journal of China, Volume 92, Issue 2,2012, Pages 91-93, doi:10.3760/cma.j.issn.0376-2491.2012.02.004
National Medical Journal of China, Volume 92, Issue 2,2012, Pages 141, doi:10.3760/cma.j.issn.0376-2491.2012.02.020
National Medical Journal of China, Volume 92, Issue 2,2012, Pages 137-140, doi:10.3760/cma.j.issn.0376-2491.2012.02.018