IFIH1 and dermatomyositis: Patients were considered to be DM-nonILD-MSA16(-) when 16 MSAs were undetected in serum, including anti-aminoacyl-transfer (t)RNA synthetase autoantibodies (anti-Jo-1, anti-PL-7, anti-PL-12, anti-EJ, and anti-OJ), anti-Ro-52, anti-signal recognition particle antibodies (anti-SRP), anti-PM-SCL75, anti-PM-SCL100, anti-KU, anti-small ubiquitin-like modifier activating enzyme antibodies (anti-SAE), anti-nuclear matrix protein 2 antibodies (anti-NXP2), anti-MDA5, transcriptional intermediary factor-1γ autoantibodies (anti-TIF1γ), anti-MI-2α, and anti-MI-2β antibodies.