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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 5,2004, Pages 369-371, doi:10.3760/j:issn:0376-2491.2004.05.006
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 5,2004, Pages 431, doi:10.3760/j:issn:0376-2491.2004.05.029
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 84, Issue 5,2004, Pages 418-419, doi:10.3760/j:issn:0376-2491.2004.05.019