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 1819-1823, doi:10.3760/cma.j.issn.0376-2491.2019.23.014
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 1787-1791, doi:10.3760/cma.j.issn.0376-2491.2019.23.007
National Medical Journal of China, Volume 99, Issue 23,2019, Pages 1805-1808, doi:10.3760/cma.j.issn.0376-2491.2019.23.011