NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 37,2009, Pages 2616-2620, doi:10.3760/cma.j.issn.0376-2491.2009.37.007
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 37,2009, Pages 2607-2610, doi:10.3760/cma.j.issn.0376-2491.2009.37.005
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 37,2009, Pages 2639-2643, doi:10.3760/cma.j.issn.0376-2491.2009.37.012
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 37,2009, Pages 2649-2653, doi:10.3760/cma.j.issn.0376-2491.2009.37.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 37,2009, Pages 2593-2596, doi:10.3760/cma.j.issn.0376-2491.2009.37.001