CLCA4 expression levels were also positively correlated with infiltrating levels of B cells (r = 0.32, P = 1.92E−03), CD8+ T cells (r = − 0.23, P = 2.95E−02), CD4+ T cells (r = 0.39, P = 1.36E−04), macrophages (r = − 0.48, P = 8.42E−07), neutrophils (r = 0.5, P = 4.50E−07) and DCs (r = 0.33, P = 1.10E−03) in READ (Additional file 3 and 4). This evidence concerns the gene CLCA4 and reading.