National Medical Journal of China, Volume 94, Issue 12,2014, Pages 932-934, doi:10.3760/cma.j.issn.0376-2491.2014.12.014
National Medical Journal of China, Volume 94, Issue 12,2014, Pages 908-912, doi:10.3760/cma.j.issn.0376-2491.2014.12.008
National Medical Journal of China, Volume 94, Issue 12,2014, Pages 884-888, doi:10.3760/cma.j.issn.0376-2491.2014.12.002
National Medical Journal of China, Volume 94, Issue 12,2014, Pages 881-883, doi:10.3760/cma.j.issn.0376-2491.2014.12.001
National Medical Journal of China, Volume 94, Issue 12,2014, Pages 889-894, doi:10.3760/cma.j.issn.0376-2491.2014.12.004