To compare outcomes of patients with NCI standard risk acute lymphoblastic leukemia (ALL) who relapsed after being randomized to receive either oral or intravenous 6-mercaptopurine (6MP) in the Children's Cancer Group study CCG 1922.
Intravenous 6-mercaptopurine decreases salvage after relapse in childhood acute lymphoblastic leukemia: a report from the Children's Cancer Group study CCG 1922.