Myositis-specific (anti-Mi2, NXP2, SAE1, MDA5, TIF1γ, Jo1, PL7, PL12, EJ, OJ, KS, Zo, Ha, SRP) and myositis-associated (anti-Ro52, U1RNP, Ku, PmScl, cN1A) antibodies in addition to anti-HMGCR were rare, only occurring in nine (8.3%) patients. This evidence concerns the gene IFIH1 and myositis disease.