National Medical Journal of China, Volume 100, Issue 6,2020, Pages 471-473, doi:10.3760/cma.j.issn.0376-2491.2020.06.016
National Medical Journal of China, Volume 100, Issue 6,2020, Pages 416-418, doi:10.3760/cma.j.issn.0376-2491.2020.06.004
National Medical Journal of China, Volume 100, Issue 6,2020, Pages 401-406, doi:10.3760/cma.j.issn.0376-2491.2020.06.001
National Medical Journal of China, Volume 100, Issue 6,2020, Pages 411-415, doi:10.3760/cma.j.issn.0376-2491.2020.06.003
National Medical Journal of China, Volume 100, Issue 6,2020, Pages 465-467, doi:10.3760/cma.j.issn.0376-2491.2020.06.014