National Medical Journal of China, Volume 99, Issue 5,2019, Pages 370-374, doi:10.3760/cma.j.issn.0376-2491.2019.05.010
National Medical Journal of China, Volume 99, Issue 5,2019, Pages 359-364, doi:10.3760/cma.j.issn.0376-2491.2019.05.008
National Medical Journal of China, Volume 99, Issue 5,2019, Pages 321-328, doi:10.3760/cma.j.issn.0376-2491.2019.05.001
National Medical Journal of China, Volume 99, Issue 5,2019, Pages 365-369, doi:10.3760/cma.j.issn.0376-2491.2019.05.009