National Medical Journal of China, Volume 92, Issue 34,2012, Pages 2386-2388, doi:10.3760/cma.j.issn.0376-2491.2012.34.004
National Medical Journal of China, Volume 92, Issue 34,2012, Pages 2389-2393, doi:10.3760/cma.j.issn.0376-2491.2012.34.005
National Medical Journal of China, Volume 92, Issue 34,2012, Pages 2406-2409, doi:10.3760/cma.j.issn.0376-2491.2012.34.009
National Medical Journal of China, Volume 92, Issue 34,2012, Pages 2398-2401, doi:10.3760/cma.j.issn.0376-2491.2012.34.007
National Medical Journal of China, Volume 92, Issue 34,2012, Pages 2419-2425, doi:10.3760/cma.j.issn.0376-2491.2012.34.012