National Medical Journal of China, Volume 98, Issue 7,2018, Pages 555-557, doi:10.3760/cma.j.issn.0376-2491.2018.07.016
National Medical Journal of China, Volume 98, Issue 7,2018, Pages 519-523, doi:10.3760/cma.j.issn.0376-2491.2018.07.007
National Medical Journal of China, Volume 98, Issue 7,2018, Pages 527-532, doi:10.3760/cma.j.issn.0376-2491.2018.07.009
National Medical Journal of China, Volume 98, Issue 7,2018, Pages 544-548, doi:10.3760/cma.j.issn.0376-2491.2018.07.012
National Medical Journal of China, Volume 98, Issue 7,2018, Pages 549-550, doi:10.3760/cma.j.issn.0376-2491.2018.07.013