National Medical Journal of China, Volume 92, Issue 31,2012, Pages 2202-2204, doi:10.3760/cma.j.issn.0376-2491.2012.31.014
National Medical Journal of China, Volume 92, Issue 31,2012, Pages 2225-2227, doi:10.3760/cma.j.issn.0376-2491.2012.31.020
National Medical Journal of China, Volume 92, Issue 31,2012, Pages 2186-2190, doi:10.3760/cma.j.issn.0376-2491.2012.31.010
National Medical Journal of China, Volume 92, Issue 31,2012, Pages 2170, doi:10.3760/cma.j.issn.0376-2491.2012.31.005
National Medical Journal of China, Volume 92, Issue 31,2012, Pages 2161, doi:10.3760/cma.j.issn.0376-2491.2012.31.001