National Medical Journal of China, Volume 99, Issue 35,2019, Pages 2745-2749, doi:10.3760/cma.j.issn.0376-2491.2019.35.006
National Medical Journal of China, Volume 99, Issue 35,2019, Pages 2761-2767, doi:10.3760/cma.j.issn.0376-2491.2019.35.009
National Medical Journal of China, Volume 99, Issue 35,2019, Pages 2777-2780, doi:10.3760/cma.j.issn.0376-2491.2019.35.012
National Medical Journal of China, Volume 99, Issue 35,2019, Pages 2729-2732, doi:10.3760/cma.j.issn.0376-2491.2019.35.003
National Medical Journal of China, Volume 99, Issue 35,2019, Pages 2721-2724, doi:10.3760/cma.j.issn.0376-2491.2019.35.001