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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 44,2007, Pages 3158-3160, doi:10.3760/j.issn:0376-2491.2007.44.018
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 44,2007, Pages 3133-3137, doi:10.3760/j.issn:0376-2491.2007.44.012
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 87, Issue 44,2007, Pages 3099, doi:10.3760/j.issn:0376-2491.2007.44.022