National Medical Journal of China, Volume 93, Issue 36,2013, Pages 2861-2866, doi:10.3760/cma.j.issn.0376-2491.2013.36.005
National Medical Journal of China, Volume 93, Issue 36,2013, Pages 2909-2912, doi:10.3760/cma.j.issn.0376-2491.2013.36.016
National Medical Journal of China, Volume 93, Issue 36,2013, Pages 2884-2889, doi:10.3760/cma.j.issn.0376-2491.2013.36.010
National Medical Journal of China, Volume 93, Issue 36,2013, Pages 2901-2903, doi:10.3760/cma.j.issn.0376-2491.2013.36.014
National Medical Journal of China, Volume 93, Issue 36,2013, Pages 2871-2875, doi:10.3760/cma.j.issn.0376-2491.2013.36.007