National Medical Journal of China, Volume 99, Issue 18,2019, Pages 1431-1432, doi:10.3760/cma.j.issn.0376-2491.2019.18.016
National Medical Journal of China, Volume 99, Issue 18,2019, Pages 1401-1405, doi:10.3760/cma.j.issn.0376-2491.2019.18.009
National Medical Journal of China, Volume 99, Issue 18,2019, Pages 1437-1440, doi:10.3760/cma.j.issn.0376-2491.2019.18.018
National Medical Journal of China, Volume 99, Issue 18,2019, Pages 1361-1364, doi:10.3760/cma.j.issn.0376-2491.2019.18.001
National Medical Journal of China, Volume 99, Issue 18,2019, Pages 1369-1374, doi:10.3760/cma.j.issn.0376-2491.2019.18.003