TNFSF13B and dermatomyositis: Serum levels of BAFF was significantly higher in patients with anti-MDA5+DM than those in patients with ASS (3882.32 ± 1880.09 vs. 2540.89 ± 1403.04, p = 0.0056) or HC (3882.32 ± 1880.09 vs. 2486.28 ± 767.97 pg/mL, p = 0.003) (Fig. 1 and Table 1).