National Medical Journal of China, Volume 100, Issue 1,2020, Pages 22-25, doi:10.3760/cma.j.issn.0376-2491.2020.01.006
National Medical Journal of China, Volume 100, Issue 1,2020, Pages 4-6, doi:10.3760/cma.j.issn.0376-2491.2020.01.002
National Medical Journal of China, Volume 100, Issue 1,2020, Pages 15-21, doi:10.3760/cma.j.issn.0376-2491.2020.01.005
National Medical Journal of China, Volume 100, Issue 1,2020, Pages 47-50, doi:10.3760/cma.j.issn.0376-2491.2020.01.011
National Medical Journal of China, Volume 100, Issue 1,2020, Pages 37-41, doi:10.3760/cma.j.issn.0376-2491.2020.01.009