National Medical Journal of China, Volume 93, Issue 11,2013, Pages 801-802, doi:10.3760/cma.j.issn.0376-2491.2013.11.001
National Medical Journal of China, Volume 93, Issue 11,2013, Pages 837-840, doi:10.3760/cma.j.issn.0376-2491.2013.11.011
National Medical Journal of China, Volume 93, Issue 11,2013, Pages 827-831, doi:10.3760/cma.j.issn.0376-2491.2013.11.009
National Medical Journal of China, Volume 93, Issue 11,2013, Pages 868-872, doi:10.3760/cma.j.issn.0376-2491.2013.11.019
National Medical Journal of China, Volume 93, Issue 11,2013, Pages 856-859, doi:10.3760/cma.j.issn.0376-2491.2013.11.016