IFIH1 and dermatomyositis: In the DM subgroup, MSA was found in 71% of the cases, which were apportioned as follows: anti-TIF1γ antibody (Ab) n = 10/31, anti-NXP2 Ab n = 5/31, anti-Mi2 Ab n = 3, anti-SAE Ab n = 2/31, and anti-MDA5 Ab n = 2/3.