High CCL4 protein level was also found in chronic lymphocytic leukemia B cells co‐cultures with nurse‐like cells, and the induction of CCL4 was abolished by a Syk inhibitor (R406), suggesting that nurse‐like cells induce the chemokine via B‐cell receptor (BCR) activation [24]. The gene discussed is SYK; the disease is B-cell chronic lymphocytic leukemia.