CX3CR1 and diabetes mellitus: However, correlation analysis between CX3CR1 expression on lymphocytes and cytokine levels revealed a strong inverse correlation for non‐DM patients only (Fig. 3D–F, IL‐15: r2 = –0.7, p = 0.0003; IL‐18: r2 = –0.6, p = 0.002; IL‐18/IL‐18BPa: r2 = –0.6, p = 0.009).