National Medical Journal of China, Volume 100, Issue 4,2020, Pages 286-290, doi:10.3760/cma.j.issn.0376-2491.2020.04.009
National Medical Journal of China, Volume 100, Issue 4,2020, Pages 244-246, doi:10.3760/cma.j.issn.0376-2491.2020.04.002
National Medical Journal of China, Volume 100, Issue 4,2020, Pages 313, doi:10.3760/cma.j.issn.0376-2491.2020.04.015
National Medical Journal of China, Volume 100, Issue 4,2020, Pages 265-269, doi:10.3760/cma.j.issn.0376-2491.2020.04.005
National Medical Journal of China, Volume 100, Issue 4,2020, Pages 307-309, doi:10.3760/cma.j.issn.0376-2491.2020.04.013