National Medical Journal of China, Volume 99, Issue 27,2019, Pages 2145-2147, doi:10.3760/cma.j.issn.0376-2491.2019.27.010
National Medical Journal of China, Volume 99, Issue 27,2019, Pages 2141-2144, doi:10.3760/cma.j.issn.0376-2491.2019.27.009
National Medical Journal of China, Volume 99, Issue 27,2019, Pages 2119-2123, doi:10.3760/cma.j.issn.0376-2491.2019.27.005
National Medical Journal of China, Volume 99, Issue 27,2019, Pages 2148-2151, doi:10.3760/cma.j.issn.0376-2491.2019.27.011
National Medical Journal of China, Volume 99, Issue 27,2019, Pages 2158-2160, doi:10.3760/cma.j.issn.0376-2491.2019.27.014