National Medical Journal of China, Volume 99, Issue 1,2019, Pages 14-19, doi:10.3760/cma.j.issn.0376-2491.2019.01.004
National Medical Journal of China, Volume 99, Issue 1,2019, Pages 53-56, doi:10.3760/cma.j.issn.0376-2491.2019.01.012
National Medical Journal of China, Volume 99, Issue 1,2019, Pages 70-71, doi:10.3760/cma.j.issn.0376-2491.2019.01.016
National Medical Journal of China, Volume 99, Issue 1,2019, Pages 20-24, doi:10.3760/cma.j.issn.0376-2491.2019.01.005
National Medical Journal of China, Volume 99, Issue 1,2019, Pages 75-78, doi:10.3760/cma.j.issn.0376-2491.2019.01.018