National Medical Journal of China, Volume 98, Issue 33,2018, Pages 2636-2640, doi:10.3760/cma.j.issn.0376-2491.2018.33.005
National Medical Journal of China, Volume 98, Issue 33,2018, Pages 2666-2670, doi:10.3760/cma.j.issn.0376-2491.2018.33.011
National Medical Journal of China, Volume 98, Issue 33,2018, Pages 2656-2660, doi:10.3760/cma.j.issn.0376-2491.2018.33.009
National Medical Journal of China, Volume 98, Issue 33,2018, Pages 2688-2690, doi:10.3760/cma.j.issn.0376-2491.2018.33.017