National Medical Journal of China, Volume 99, Issue 11,2019, Pages 838-840, doi:10.3760/cma.j.issn.0376-2491.2019.11.008
National Medical Journal of China, Volume 99, Issue 11,2019, Pages 841-843, doi:10.3760/cma.j.issn.0376-2491.2019.11.009
National Medical Journal of China, Volume 99, Issue 11,2019, Pages 806-811, doi:10.3760/cma.j.issn.0376-2491.2019.11.002
National Medical Journal of China, Volume 99, Issue 11,2019, Pages 865-867, doi:10.3760/cma.j.issn.0376-2491.2019.11.014
National Medical Journal of China, Volume 99, Issue 11,2019, Pages 829-833, doi:10.3760/cma.j.issn.0376-2491.2019.011.006