Gene expression profiles of primary leukemia cells in diagnostic bone marrow specimens of BPL patients who subsequently experienced an early relapse (N=40; time to relapse <36 months) were not suggestive of diminished IK activity when compared to primary leukemia cells from patients who experience a late relapse (N=19; time to relapse ≥36 months) (Figure S8 in File S1). This evidence concerns the gene IK and leukemia.