National Medical Journal of China, Volume 98, Issue 4,2018, Pages 289-293, doi:10.3760/cma.j.issn.0376-2491.2018.04.010
National Medical Journal of China, Volume 98, Issue 4,2018, Pages 280-283, doi:10.3760/cma.j.issn.0376-2491.2018.04.008
National Medical Journal of China, Volume 98, Issue 4,2018, Pages 307-308, doi:10.3760/cma.j.issn.0376-2491.2018.04.015
National Medical Journal of China, Volume 98, Issue 4,2018, Pages 284-288, doi:10.3760/cma.j.issn.0376-2491.2018.04.009
National Medical Journal of China, Volume 98, Issue 4,2018, Pages 299-301, doi:10.3760/cma.j.issn.0376-2491.2018.04.012