National Medical Journal of China, Volume 99, Issue 23,2019, Pages 1814-1818, doi:10.3760/cma.j.issn.0376-2491.2019.23.013
National Medical Journal of China, Volume 99, Issue 23,2019, Pages 1792-1795, doi:10.3760/cma.j.issn.0376-2491.2019.23.008
National Medical Journal of China, Volume 99, Issue 23,2019, Pages 1819-1823, doi:10.3760/cma.j.issn.0376-2491.2019.23.014
National Medical Journal of China, Volume 99, Issue 23,2019, Pages 1838-1840, doi:10.3760/cma.j.issn.0376-2491.2019.23.020
National Medical Journal of China, Volume 99, Issue 23,2019, Pages 1831-1833, doi:10.3760/cma.j.issn.0376-2491.2019.23.018