National Medical Journal of China, Volume 95, Issue 11,2015, Pages 841-844, doi:10.3760/cma.j.issn.0376-2491.2015.11.010
National Medical Journal of China, Volume 95, Issue 11,2015, Pages 832-835, doi:10.3760/cma.j.issn.0376-2491.2015.11.008
National Medical Journal of China, Volume 95, Issue 11,2015, Pages 823-826, doi:10.3760/cma.j.issn.0376-2491.2015.11.006
National Medical Journal of China, Volume 95, Issue 11,2015, Pages 873-876, doi:10.3760/cma.j.issn.0376-2491.2015.11.018
National Medical Journal of China, Volume 95, Issue 11,2015, Pages 877-880, doi:10.3760/cma.j.issn.0376-2491.2015.11.019