National Medical Journal of China, Volume 98, Issue 11,2018, Pages 878-880, doi:10.3760/cma.j.issn.0376-2491.2018.11.019
National Medical Journal of China, Volume 98, Issue 11,2018, Pages 842-845, doi:10.3760/cma.j.issn.0376-2491.2018.11.010
National Medical Journal of China, Volume 98, Issue 11,2018, Pages 801-802, doi:10.3760/cma.j.issn.0376-2491.2018.11.001
National Medical Journal of China, Volume 98, Issue 11,2018, Pages 813-817, doi:10.3760/cma.j.issn.0376-2491.2018.11.004
National Medical Journal of China, Volume 98, Issue 11,2018, Pages 808-812, doi:10.3760/cma.j.issn.0376-2491.2018.11.003