National Medical Journal of China, Volume 92, Issue 43,2012, Pages 3042-3045, doi:10.3760/cma.j.issn.0376-2491.2012.43.006
National Medical Journal of China, Volume 92, Issue 43,2012, Pages 3025-3027, doi:10.3760/cma.j.issn.0376-2491.2012.43.001
National Medical Journal of China, Volume 92, Issue 43,2012, Pages 3031, doi:10.3760/cma.j.issn.0376-2491.2012.43.003
National Medical Journal of China, Volume 92, Issue 43,2012, Pages 3028-3031, doi:10.3760/cma.j.issn.0376-2491.2012.43.002
National Medical Journal of China, Volume 92, Issue 43,2012, Pages 3036-3041, doi:10.3760/cma.j.issn.0376-2491.2012.43.005