National Medical Journal of China, Volume 95, Issue 34,2015, Pages 2791-2795, doi:10.3760/cma.j.issn.0376-2491.2015.34.013
National Medical Journal of China, Volume 95, Issue 34,2015, Pages 2783-2786, doi:10.3760/cma.j.issn.0376-2491.2015.34.011
National Medical Journal of China, Volume 95, Issue 34,2015, Pages 2805-2807, doi:10.3760/cma.j.issn.0376-2491.2015.34.017
National Medical Journal of China, Volume 95, Issue 34,2015, Pages 2771-2774, doi:10.3760/cma.j.issn.0376-2491.2015.34.008