AXL and B-cell chronic lymphocytic leukemia: To evaluate the possible impact of TP-0903 (tartrate salt) on normal immune cells we assessed the expression of Axl, Tyro3 and MER receptors by flow cytometry on the surface of B, T and NK-cells (Supplementary Figure 1A) using peripheral blood mononuclear cells (PBMCs) isolated from normal individuals and previously untreated CLL patients.