National Medical Journal of China, Volume 92, Issue 18,2012, Pages 1231-1232, doi:10.3760/cma.j.issn.0376-2491.2012.18.003
National Medical Journal of China, Volume 92, Issue 18,2012, Pages 1268-1271, doi:10.3760/cma.j.issn.0376-2491.2012.18.013
National Medical Journal of China, Volume 92, Issue 18,2012, Pages 1228-1230, doi:10.3760/cma.j.issn.0376-2491.2012.18.002
National Medical Journal of China, Volume 92, Issue 18,2012, Pages 1272-1274, doi:10.3760/cma.j.issn.0376-2491.2012.18.015
National Medical Journal of China, Volume 92, Issue 18,2012, Pages 1275-1277, doi:10.3760/cma.j.issn.0376-2491.2012.18.016