National Medical Journal of China, Volume 100, Issue 3,2020, Pages 182-186, doi:10.3760/cma.j.issn.0376-2491.2020.03.005
National Medical Journal of China, Volume 100, Issue 3,2020, Pages 207-212, doi:10.3760/cma.j.issn.0376-2491.2020.03.010
National Medical Journal of China, Volume 100, Issue 3,2020, Pages 225-229, doi:10.3760/cma.j.issn.0376-2491.2020.03.013
National Medical Journal of China, Volume 100, Issue 3,2020, Pages 197-201, doi:10.3760/cma.j.issn.0376-2491.2020.03.008
National Medical Journal of China, Volume 100, Issue 3,2020, Pages 234-236, doi:10.3760/cma.j.issn.0376-2491.2020.03.016