National Medical Journal of China, Volume 95, Issue 6,2015, Pages 416-419, doi:10.3760/cma.j.issn.0376-2491.2015.06.005
National Medical Journal of China, Volume 95, Issue 6,2015, Pages 425-429, doi:10.3760/cma.j.issn.0376-2491.2015.06.007
National Medical Journal of China, Volume 95, Issue 6,2015, Pages 444-448, doi:10.3760/cma.j.issn.0376-2491.2015.06.011
National Medical Journal of China, Volume 95, Issue 6,2015, Pages 449-452, doi:10.3760/cma.j.issn.0376-2491.2015.06.012
National Medical Journal of China, Volume 95, Issue 6,2015, Pages 420-424, doi:10.3760/cma.j.issn.0376-2491.2015.06.006