National Medical Journal of China, Volume 99, Issue 25,2019, Pages 1994-1998, doi:10.3760/cma.j.issn.0376-2491.2019.25.021
National Medical Journal of China, Volume 99, Issue 25,2019, Pages 1985-1988, doi:10.3760/cma.j.issn.0376-2491.2019.25.017
National Medical Journal of China, Volume 99, Issue 25,2019, Pages 1921-1924, doi:10.3760/cma.j.issn.0376-2491.2019.25.001
National Medical Journal of China, Volume 99, Issue 25,2019, Pages 1945-1948, doi:10.3760/cma.j.issn.0376-2491.2019.25.008
National Medical Journal of China, Volume 99, Issue 25,2019, Pages 1992-1993, doi:10.3760/cma.j.issn.0376-2491.2019.25.020