TNF and dermatomyositis: Some studies had investigated the relationship between TNF-α-238A/G, +489 A/G, −1031T/C, −863C/A, −857C/T polymorphisms and the susceptibility to DM [11], [14]–[15], [17], we also summarized the characteristics of studies and populations on the association between other TNF polymorphisms and DM risk (The details of the characteristics were provided in Table S1, S2A, S2B, S2C, S2D in File S1).