National Medical Journal of China, Volume 95, Issue 2,2015, Pages 156-158, doi:10.3760/cma.j.issn.0376-2491.2015.02.022
National Medical Journal of China, Volume 95, Issue 2,2015, Pages 153-155, doi:10.3760/cma.j.issn.0376-2491.2015.02.021
National Medical Journal of China, Volume 95, Issue 2,2015, Pages 133-137, doi:10.3760/cma.j.issn.0376-2491.2015.02.014
National Medical Journal of China, Volume 95, Issue 2,2015, Pages 116-119, doi:10.3760/cma.j.issn.0376-2491.2015.02.009
National Medical Journal of China, Volume 95, Issue 2,2015, Pages 150-152, doi:10.3760/cma.j.issn.0376-2491.2015.02.020