NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 5,2007, Pages 353-355, doi:10.3760/j:issn:0376-2491.2007.05.016
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 5,2007, Pages 325-329, doi:10.3760/j:issn:0376-2491.2007.05.009
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 5,2007, Pages 298-303, doi:10.3760/j:issn:0376-2491.2007.05.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 5,2007, Pages 333-335, doi:10.3760/j:issn:0376-2491.2007.05.011