NATIONAL MEDICAL JOURNAL OF CHINA, Volume 85, Issue 19,2005, Pages 1339-1343, doi:10.3760/j:issn:0376-2491.2005.19.010
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 85, Issue 19,2005, Pages 1360-1361, doi:10.3760/j:issn:0376-2491.2005.19.016