Boolean operators and Medical Subject Headings (MeSH) terms were combined as follows: “immune-mediated necrotizing myopathy,” “IMNM,” “anti-HMG-CoA reductase,” “anti-signal recognition particle,” “statin-associated myopathy,” and “necrotizing autoimmune myopathy.” Reference lists of major reviews and cohort studies were hand-searched to identify additional reports. Here, HMGCR is linked to myopathy.