National Medical Journal of China, Volume 98, Issue 3,2018, Pages 191-195, doi:10.3760/cma.j.issn.0376-2491.2018.03.007
National Medical Journal of China, Volume 98, Issue 3,2018, Pages 164-170, doi:10.3760/cma.j.issn.0376-2491.2018.03.002
National Medical Journal of China, Volume 98, Issue 3,2018, Pages 231-233, doi:10.3760/cma.j.issn.0376-2491.2018.03.017
National Medical Journal of China, Volume 98, Issue 3,2018, Pages 234-236, doi:10.3760/cma.j.issn.0376-2491.2018.03.018