National Medical Journal of China, Volume 92, Issue 11,2012, Pages 764-767, doi:10.3760/cma.j.issn.0376-2491.2012.11.012
National Medical Journal of China, Volume 92, Issue 11,2012, Pages 791-792, doi:10.3760/cma.j.issn.0376-2491.2012.11.019
National Medical Journal of China, Volume 92, Issue 11,2012, Pages 721-723, doi:10.3760/cma.j.issn.0376-2491.2012.11.001
National Medical Journal of China, Volume 92, Issue 11,2012, Pages 724-726, doi:10.3760/cma.j.issn.0376-2491.2012.11.002
National Medical Journal of China, Volume 92, Issue 11,2012, Pages 785-787, doi:10.3760/cma.j.issn.0376-2491.2012.11.017