IFIH1 and dermatomyositis: CK: creatine kinase; DM: dermatomyositis; MRI: magnetic resonance imaging; SNP: single nucleotide polymorphism; SLCO1B1: solute carrier organic anion transporter family member 1B1; Jo-1: histidyl-tRNA synthetase antibody; Mi-2: nucleosome remodeling deacetylase complex antibody; NXP-2: nuclear matrix protein 2 antibody; TIF1-γ: transcriptional intermediary factor 1-gamma antibody; MDA5: melanoma differentiation-associated gene 5 antibody; SAE: small ubiquitin-like modifier activating enzyme antibody