CD19 and lobular neoplasia: While, the similar negative associations were found between the urine LAIR1 level and the absolute number of CD19+ B cells (r = −0.7848, p < 0.05) and CD3+ T cells (r = −0.7988, p < 0.05) in the whole blood of inactive JSLE‐LN patients (Figures 1E–1F).