TNF and dermatomyositis: Juvenile DM-related polymorphisms are reported in the genes encoding tumor necrosis factor alpha (TNF-α) promotor, interleukin-1β (IL-1β), IL-1 receptor antagonist intron, interferon regulatory factor 5, mannose-binding lectin, chemokine (C-C motif) ligand 21, phospholipase C-like protein 1, and B lymphoid kinase [32,33,34].