National Medical Journal of China, Volume 99, Issue 30,2019, Pages 2355-2361, doi:10.3760/cma.j.issn.0376-2491.2019.30.007
National Medical Journal of China, Volume 99, Issue 30,2019, Pages 2367-2374, doi:10.3760/cma.j.issn.0376-2491.2019.30.009
National Medical Journal of China, Volume 99, Issue 30,2019, Pages 2385-2386, doi:10.3760/cma.j.issn.0376-2491.2019.30.012
National Medical Journal of China, Volume 99, Issue 30,2019, Pages 2375-2382, doi:10.3760/cma.j.issn.0376-2491.2019.30.010