TNFRSF17 and systemic lupus erythematosus: Also, the frequency of BCMA positive B cells were elevated in SLE patients (DN: 1.08% vs 0.40%, p = 0.0400; NAV: 0.79% vs 0.27%, p = 0.0147; SWM: 1.7% vs 0.7%, p = 0.0054; and USM: 4.2% vs 2.0%, p = 0.0079) (Figures 3A–D).