CD19 and systemic lupus erythematosus: The findings indicate that xeroderma pigentosum B cells (P = 1.00 × 10−6), CD14+ monocytes (P = 1.00 × 10−6), CD19+ B cells (P = 1.00 × 10−6), plasmacytoid dendritic cells (pDCs) (P = 6.10 × 10−5) remained significantly involved in the SLE (Figure S3 and Table S2).