Ann Rheum Dis 2017 Dec
2017 European League Against Rheumatism/American College of Rheumatology classification criteria for adult and juvenile idiopathic inflammatory myopathies and their major subgroups.
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New answer by at University of Minnesota (May 25, 2022)
Muscle biopsy is generally recommended and useful in most cases of suspected inflammatory/immune myopathy; accurate pathologic diagnosis is imperative for prognostication, ide...