National Medical Journal of China, Volume 99, Issue 4,2019, Pages 318-320, doi:10.3760/cma.j.issn.0376-2491.2019.04.016
National Medical Journal of China, Volume 99, Issue 4,2019, Pages 253-255, doi:10.3760/cma.j.issn.0376-2491.2019.04.003
National Medical Journal of China, Volume 99, Issue 4,2019, Pages 307-311, doi:10.3760/cma.j.issn.0376-2491.2019.04.014
National Medical Journal of China, Volume 99, Issue 4,2019, Pages 241-246, doi:10.3760/cma.j.issn.0376-2491.2019.04.001
National Medical Journal of China, Volume 99, Issue 4,2019, Pages 312-317, doi:10.3760/cma.j.issn.0376-2491.2019.04.015