National Medical Journal of China, Volume 99, Issue 16,2019, Pages 1256-1261, doi:10.3760/cma.j.issn.0376-2491.2019.16.013
National Medical Journal of China, Volume 99, Issue 16,2019, Pages 1216-1220, doi:10.3760/cma.j.issn.0376-2491.2019.16.005
National Medical Journal of China, Volume 99, Issue 16,2019, Pages 1267-1270, doi:10.3760/cma.j.issn.0376-2491.2019.16.015
National Medical Journal of China, Volume 99, Issue 16,2019, Pages 1274-1277, doi:10.3760/cma.j.issn.0376-2491.2019.16.017