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Cumulative incidence of first relapse of acute lymphoblastic leukemia according to (A) taking mercaptopurine (6-MP) with food versus never with food; (B) taking 6-MP with milk or dairy products versus never with milk/dairy; (C) taking 6-MP in the evening/night versus morning/midday versus varying times of day; (D) swallowing 6-MP tablet whole versus crushed/dissolved versus chewed.
