National Medical Journal of China, Volume 94, Issue 4,2014, Pages 273-275, doi:10.3760/cma.j.issn.0376-2491.2014.04.009
National Medical Journal of China, Volume 94, Issue 4,2014, Pages 296-300, doi:10.3760/cma.j.issn.0376-2491.2014.04.015
National Medical Journal of China, Volume 94, Issue 4,2014, Pages 269-272, doi:10.3760/cma.j.issn.0376-2491.2014.04.008
National Medical Journal of China, Volume 94, Issue 4,2014, Pages 306-309, doi:10.3760/cma.j.issn.0376-2491.2014.04.017
National Medical Journal of China, Volume 94, Issue 4,2014, Pages 293-295, doi:10.3760/cma.j.issn.0376-2491.2014.04.014