NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 11,2009, Pages 736-739, doi:10.3760/cma.j.issn.0376-2491.2009.11.005
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 11,2009, Pages 786-789, doi:10.3760/cma.j.issn.0376-2491.2009.11.016
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 11,2009, Pages 721-722, doi:10.3760/cma.j.issn.0376-2491.2009.11.001
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 11,2009, Pages 727-731, doi:10.3760/cma.j.issn.0376-2491.2009.11.003