National Medical Journal of China, Volume 95, Issue 8,2015, Pages 631-633, doi:10.3760/cma.j.issn.0376-2491.2015.08.017
National Medical Journal of China, Volume 95, Issue 8,2015, Pages 577-580, doi:10.3760/cma.j.issn.0376-2491.2015.08.004
National Medical Journal of China, Volume 95, Issue 8,2015, Pages 637-640, doi:10.3760/cma.j.issn.0376-2491.2015.08.019
National Medical Journal of China, Volume 95, Issue 8,2015, Pages 621-626, doi:10.3760/cma.j.issn.0376-2491.2015.08.014
National Medical Journal of China, Volume 95, Issue 8,2015, Pages 611-615, doi:10.3760/cma.j.issn.0376-2491.2015.08.012