National Medical Journal of China, Volume 99, Issue 29,2019, Pages 2302-2307, doi:10.3760/cma.j.issn.0376-2491.2019.29.011
National Medical Journal of China, Volume 99, Issue 29,2019, Pages 2241-2243, doi:10.3760/cma.j.issn.0376-2491.2019.29.001
National Medical Journal of China, Volume 99, Issue 29,2019, Pages 2288-2292, doi:10.3760/cma.j.issn.0376-2491.2019.29.008
National Medical Journal of China, Volume 99, Issue 29,2019, Pages 2315-2318, doi:10.3760/cma.j.issn.0376-2491.2019.29.014
National Medical Journal of China, Volume 99, Issue 29,2019, Pages 2282-2287, doi:10.3760/cma.j.issn.0376-2491.2019.29.007