National Medical Journal of China, Volume 92, Issue 19,2012, Pages 1300-1303, doi:10.3760/cma.j.issn.0376-2491.2012.19.002
National Medical Journal of China, Volume 92, Issue 19,2012, Pages 1337-1339, doi:10.3760/cma.j.issn.0376-2491.2012.19.012
National Medical Journal of China, Volume 92, Issue 19,2012, Pages 1346-1348, doi:10.3760/cma.j.issn.0376-2491.2012.19.015
National Medical Journal of China, Volume 92, Issue 19,2012, Pages 1325-1329, doi:10.3760/cma.j.issn.0376-2491.2012.19.009
National Medical Journal of China, Volume 92, Issue 19,2012, Pages 1297-1299, doi:10.3760/cma.j.issn.0376-2491.2012.19.001