NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 19,2009, Pages 1368, doi:10.3760/cma.j.issn.0376-2491.2009.19.020
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 19,2009, Pages 1330-1333, doi:10.3760/cma.j.issn.0376-2491.2009.19.010
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 19,2009, Pages 1300-1304, doi:10.3760/cma.j.issn.0376-2491.2009.19.002
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