National Medical Journal of China, Volume 92, Issue 38,2012, Pages 2671-2673, doi:10.3760/cma.j.issn.0376-2491.2012.38.003
National Medical Journal of China, Volume 92, Issue 38,2012, Pages 2736, doi:10.3760/cma.j.issn.0376-2491.2012.38.021
National Medical Journal of China, Volume 92, Issue 38,2012, Pages 2730-2732, doi:10.3760/cma.j.issn.0376-2491.2012.38.019
National Medical Journal of China, Volume 92, Issue 38,2012, Pages 2685-2688, doi:10.3760/cma.j.issn.0376-2491.2012.38.007