TNFSF13B and systemic lupus erythematosus: BAFF-transgenic mice and mice with B cell-specific BTK overexpression (CD19-hBtk) develop autoimmune pathology resembling human systemic lupus erythematosus (SLE) and primary Sjögren’s syndrome (pSS; Thien et al., 2004; Kil et al., 2012).