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<b>Classification Criteria for <br>
Idiopathic Inflammatory Myopathies</b>
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<b>Elevated serum levels of 
creatine kinase (CK) or 
lactate dehydrogenase (LDH) or
aspartate aminotransferase (ASAT/AST/SGOT) or
alanine aminotransferase (ALAT/ALT/SGPT).</b> The most abnormal test values during the disease course (highest absolute level of enzyme) above the relevant upper limit of normal.
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