National Medical Journal of China, Volume 93, Issue 12,2013, Pages 892-896, doi:10.3760/cma.j.issn.0376-2491.2013.12.004
National Medical Journal of China, Volume 93, Issue 12,2013, Pages 927-929, doi:10.3760/cma.j.issn.0376-2491.2013.12.012
National Medical Journal of China, Volume 93, Issue 12,2013, Pages 924-926, doi:10.3760/cma.j.issn.0376-2491.2013.12.011
National Medical Journal of China, Volume 93, Issue 12,2013, Pages 944-950, doi:10.3760/cma.j.issn.0376-2491.2013.12.016