NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 8,2011, Pages 567, doi:10.3760/cma.j.issn.0376-2491.2011.08.017
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 8,2011, Pages 549-553, doi:10.3760/cma.j.issn.0376-2491.2011.08.013
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 8,2011, Pages 516-519, doi:10.3760/cma.j.issn.0376-2491.2011.08.004
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 8,2011, Pages 564-567, doi:10.3760/cma.j.issn.0376-2491.2011.08.016