CCL4 and autoimmune disease: CCR5 and its ligands C‐C motif ligand 3 (CCL3; also termed macrophage inflammatory protein [MIP]‐1α), CCL4 (MIP‐1β), CCL5 (regulated upon activation, normal T cell expressed and secreted [RANTES]), and CCL3L1 have been associated with exacerbation of chronic inflammatory and autoimmune diseases.