IL4 and B-cell chronic lymphocytic leukemia: Yelo et al. (10) and Alcaraz-Garcia et al. (11) have shown that Dock10 is encoded by a gene that is induced by interleukin-4 (IL-4) in chronic lymphocytic leukemia (CLL) cells and in human peripheral blood B lymphocytes but not T lymphocytes (10, 11).