National Medical Journal of China, Volume 93, Issue 35,2013, Pages 2826-2829, doi:10.3760/cma.j.issn.0376-2491.2013.35.018
National Medical Journal of China, Volume 93, Issue 35,2013, Pages 2816-2819, doi:10.3760/cma.j.issn.0376-2491.2013.35.014
National Medical Journal of China, Volume 93, Issue 35,2013, Pages 2806-2809, doi:10.3760/cma.j.issn.0376-2491.2013.35.011
National Medical Journal of China, Volume 93, Issue 35,2013, Pages 2790-2793, doi:10.3760/cma.j.issn.0376-2491.2013.35.007
National Medical Journal of China, Volume 93, Issue 35,2013, Pages 2799-2802, doi:10.3760/cma.j.issn.0376-2491.2013.35.009