National Medical Journal of China, Volume 93, Issue 5,2013, Pages 394-396, doi:10.3760/cma.j.issn.0376-2491.2013.05.019
National Medical Journal of China, Volume 93, Issue 5,2013, Pages 322-329, doi:10.3760/cma.j.issn.0376-2491.2013.05.002
National Medical Journal of China, Volume 93, Issue 5,2013, Pages 341-344, doi:10.3760/cma.j.issn.0376-2491.2013.05.005
National Medical Journal of China, Volume 93, Issue 5,2013, Pages 352-356, doi:10.3760/cma.j.issn.0376-2491.2013.05.008
National Medical Journal of China, Volume 93, Issue 5,2013, Pages 373-375, doi:10.3760/cma.j.issn.0376-2491.2013.05.013