NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 34,2009, Pages 2424-2428, doi:10.3760/cma.j.issn.0376-2491.2009.34.014
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 34,2009, Pages 2442-2444, doi:10.3760/cma.j.issn.0376-2491.2009.34.020
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 34,2009, Pages 2437-2439, doi:10.3760/cma.j.issn.0376-2491.2009.34.018