SLCO4A1 and neoplasm: However, the expression of SLCO4A1 was not associated with tumor purity (cor = 0.097, P = 5.06e − 2), CD4+ T cells (cor = −0.006, P = 9.10e − 1), macrophages (cor = −0.053, P = 2.92e − 1), and neutrophils (cor = 0.038, P = 4.49e − 1) (Figure 6(a)).