National Medical Journal of China, Volume 99, Issue 8,2019, Pages 624-627, doi:10.3760/cma.j.issn.0376-2491.2019.08.012
National Medical Journal of China, Volume 99, Issue 8,2019, Pages 635-636, doi:10.3760/cma.j.issn.0376-2491.2019.08.016
National Medical Journal of China, Volume 99, Issue 8,2019, Pages 599-604, doi:10.3760/cma.j.issn.0376-2491.2019.08.007
National Medical Journal of China, Volume 99, Issue 8,2019, Pages 587-592, doi:10.3760/cma.j.issn.0376-2491.2019.08.005