National Medical Journal of China, Volume 99, Issue 28,2019, Pages 2237-2240, doi:10.3760/cma.j.issn.0376-2491.2019.28.018
National Medical Journal of China, Volume 99, Issue 28,2019, Pages 2203-2207, doi:10.3760/cma.j.issn.0376-2491.2019.28.010
National Medical Journal of China, Volume 99, Issue 28,2019, Pages 2163-2165, doi:10.3760/cma.j.issn.0376-2491.2019.28.002
National Medical Journal of China, Volume 99, Issue 28,2019, Pages 2197-2202, doi:10.3760/cma.j.issn.0376-2491.2019.28.009
National Medical Journal of China, Volume 99, Issue 28,2019, Pages 2193-2196, doi:10.3760/cma.j.issn.0376-2491.2019.28.008