IFIH1 and dermatomyositis: MSAs are associated with dermatomyositis (DM) (e.g. Anti-Mi-2, Anti-TIF1-γ, Anti-MDA5), anti-synthetase syndrome (AsyS) (e.g. anti-Jo-1, anti-PL-12, anti-EJ), and immune-mediated necrotizing myopathies (IMNM) (anti-SRP, anti-HMGCR).