National Medical Journal of China, Volume 101, Issue 6,2021, Pages 421-428, doi:10.3760/cma.j.cn112137-20200513-01527
National Medical Journal of China, Volume 101, Issue 6,2021, Pages 416-420, doi:10.3760/cma.j.cn112137-20200711-02088
National Medical Journal of China, Volume 101, Issue 6,2021, Pages 429-434, doi:10.3760/cma.j.cn112137-20200620-01900
National Medical Journal of China, Volume 101, Issue 6,2021, Pages 442-445, doi:10.3760/cma.j.cn112137-20200602-01750
National Medical Journal of China, Volume 101, Issue 6,2021, Pages 435-441, doi:10.3760/cma.j.cn112137-20200903-02551