National Medical Journal of China, Volume 98, Issue 15,2018, Pages 1166-1170, doi:10.3760/cma.j.issn.0376-2491.2018.15.009
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National Medical Journal of China, Volume 98, Issue 15,2018, Pages 1125-1129, doi:10.3760/cma.j.issn.0376-2491.2018.15.002
National Medical Journal of China, Volume 98, Issue 15,2018, Pages 1158-1161, doi:10.3760/cma.j.issn.0376-2491.2018.15.007
National Medical Journal of China, Volume 98, Issue 15,2018, Pages 1176-1182, doi:10.3760/cma.j.issn.0376-2491.2018.15.011