National Medical Journal of China, Volume 101, Issue 4,2021, Pages 249-253, doi:10.3760/cma.j.cn112137-20200430-01386
National Medical Journal of China, Volume 101, Issue 4,2021, Pages 243-248, doi:10.3760/cma.j.cn112137-20200505-01427
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National Medical Journal of China, Volume 101, Issue 4,2021, Pages 293-296, doi:10.3760/cma.j.cn112137-20200531-01724