National Medical Journal of China, Volume 92, Issue 17,2012, Pages 1223-1224, doi:10.3760/cma.j.issn.0376-2491.2012.17.020
National Medical Journal of China, Volume 92, Issue 17,2012, Pages 1206-1208, doi:10.3760/cma.j.issn.0376-2491.2012.17.014
National Medical Journal of China, Volume 92, Issue 17,2012, Pages 1179-1182, doi:10.3760/cma.j.issn.0376-2491.2012.17.007
National Medical Journal of China, Volume 92, Issue 17,2012, Pages 1174-1178, doi:10.3760/cma.j.issn.0376-2491.2012.17.006
National Medical Journal of China, Volume 92, Issue 17,2012, Pages 1187-1189, doi:10.3760/cma.j.issn.0376-2491.2012.17.009