4. The following histologies are included: B-cell chronic lymphocytic leukemia (B-CLL or B-cell CLL), B-cell prolymphocytic leukemia (PLL), chronic lymphoid leukemia (CLL/PLL), hairy cell leukemia and hairy cell variant, mantle cell leukemia/lymphoma, marginal zone lymphoma/leukemia, splenic lymphoma with villous lymphocytes, CLL with evidence of transformation (e.g., Richter's transformation), large granular lymphocytic leukemia (LGL and NK-cell type).