National Medical Journal of China, Volume 93, Issue 20,2012, Pages 1384-1387, doi:10.3760/cma.j.issn.0376-2491.2012.20.006
National Medical Journal of China, Volume 93, Issue 20,2012, Pages 1396-1399, doi:10.3760/cma.j.issn.0376-2491.2012.20.009
National Medical Journal of China, Volume 93, Issue 20,2012, Pages 1440, doi:10.3760/cma.j.issn.0376-2491.2012.20.022
National Medical Journal of China, Volume 93, Issue 20,2012, Pages 1369-1371, doi:10.3760/cma.j.issn.0376-2491.2012.20.001
National Medical Journal of China, Volume 93, Issue 20,2012, Pages 1436-1438, doi:10.3760/cma.j.issn.0376-2491.2012.20.020