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In this large series of patients with idiopathic inflammatory myopathy, anti-Jo-1 antibody levels correlated modestly with muscle and joint disease, an association confirmed by a custom ELISA using recombinant human Jo-1. More striking associations emerged in a smaller longitudinal subset of patients that link anti-Jo-1 antibody levels to muscle, joint, lung, and global disease activity.
Stone et al. (Thu,) studied this question.