NATIONAL MEDICAL JOURNAL OF CHINA, Volume 85, Issue 11,2005, Pages 760-764, doi:10.3760/j:issn:0376-2491.2005.11.012
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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 85, Issue 11,2005, Pages 734-737, doi:10.3760/j:issn:0376-2491.2005.11.007
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