National Medical Journal of China, Volume 92, Issue 48,2012, Pages 3442-3444, doi:10.3760/cma.j.issn.0376-2491.2012.48.016
National Medical Journal of China, Volume 92, Issue 48,2012, Pages 3438-3441, doi:10.3760/cma.j.issn.0376-2491.2012.48.015
National Medical Journal of China, Volume 92, Issue 48,2012, Pages 3423-3425, doi:10.3760/cma.j.issn.0376-2491.2012.48.011
National Medical Journal of China, Volume 92, Issue 48,2012, Pages 3445-3447, doi:10.3760/cma.j.issn.0376-2491.2012.48.017
National Medical Journal of China, Volume 92, Issue 48,2012, Pages 3426-3428, doi:10.3760/cma.j.issn.0376-2491.2012.48.012