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NATIONAL MEDICAL JOURNAL OF CHINA, , Issue 11,1998, Pages 850-852, doi:10.3760/j:issn:0376-2491.1998.11.021
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NATIONAL MEDICAL JOURNAL OF CHINA, , Issue 11,1998, Pages 873-875, doi:10.3760/j:issn:0376-2491.1998.11.033
NATIONAL MEDICAL JOURNAL OF CHINA, , Issue 11,1998, Pages 836, doi:10.3760/j:issn:0376-2491.1998.11.012