National Medical Journal of China, Volume 99, Issue 22,2019, Pages 1756-1757, doi:10.3760/cma.j.issn.0376-2491.2019.22.017
National Medical Journal of China, Volume 99, Issue 22,2019, Pages 1746-1749, doi:10.3760/cma.j.issn.0376-2491.2019.22.013
National Medical Journal of China, Volume 99, Issue 22,2019, Pages 1735-1742, doi:10.3760/cma.j.issn.0376-2491.2019.22.011
National Medical Journal of China, Volume 99, Issue 22,2019, Pages 1712-1716, doi:10.3760/cma.j.issn.0376-2491.2019.22.006
National Medical Journal of China, Volume 99, Issue 22,2019, Pages 1731-1734, doi:10.3760/cma.j.issn.0376-2491.2019.22.010