National Medical Journal of China, Volume 99, Issue 14,2019, Pages 1119-1120, doi:10.3760/cma.j.issn.0376-2491.2019.14.017
National Medical Journal of China, Volume 99, Issue 14,2019, Pages 1053-1057, doi:10.3760/cma.j.issn.0376-2491.2019.14.004
National Medical Journal of China, Volume 99, Issue 14,2019, Pages 1041-1043, doi:10.3760/cma.j.issn.0376-2491.2019.14.001
National Medical Journal of China, Volume 99, Issue 14,2019, Pages 1081-1085, doi:10.3760/cma.j.issn.0376-2491.2019.14.009
National Medical Journal of China, Volume 99, Issue 14,2019, Pages 1058-1062, doi:10.3760/cma.j.issn.0376-2491.2019.14.005