National Medical Journal of China, Volume 93, Issue 4,2013, Pages 265-269, doi:10.3760/cma.j.issn.0376-2491.2013.04.007
National Medical Journal of China, Volume 93, Issue 4,2013, Pages 243-247, doi:10.3760/cma.j.issn.0376-2491.2013.04.002
National Medical Journal of China, Volume 93, Issue 4,2013, Pages 261-264, doi:10.3760/cma.j.issn.0376-2491.2013.04.006
National Medical Journal of China, Volume 93, Issue 4,2013, Pages 320, doi:10.3760/cma.j.issn.0376-2491.2013.04.020
National Medical Journal of China, Volume 93, Issue 4,2013, Pages 280-284, doi:10.3760/cma.j.issn.0376-2491.2013.04.010