National Medical Journal of China, Volume 92, Issue 26,2012, Pages 1841-1844, doi:10.3760/cma.j.issn.0376-2491.2012.26.012
National Medical Journal of China, Volume 92, Issue 26,2012, Pages 1832-1835, doi:10.3760/cma.j.issn.0376-2491.2012.26.010
National Medical Journal of China, Volume 92, Issue 26,2012, Pages 1871, doi:10.3760/cma.j.issn.0376-2491.2012.26.020
National Medical Journal of China, Volume 92, Issue 26,2012, Pages 1813-1815, doi:10.3760/cma.j.issn.0376-2491.2012.26.005
National Medical Journal of China, Volume 92, Issue 26,2012, Pages 1854-1857, doi:10.3760/cma.j.issn.0376-2491.2012.26.015