NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 30,2009, Pages 2103-2105, doi:10.3760/cma.j.issn.0376-2491.2009.30.007
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 30,2009, Pages 2152, doi:10.3760/cma.j.issn.0376-2491.2009.30.021
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 30,2009, Pages 2142-2146, doi:10.3760/cma.j.issn.0376-2491.2009.30.017
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 30,2009, Pages 2106-2109, doi:10.3760/cma.j.issn.0376-2491.2009.30.008