Litzow M, Lee S, Bennett J, Dewald G, Gallagher R, Jain V, Paietta E, Racevskis J, Rousey, Mazza J, Tallman M. A phase II trial of arsenic trioxide for relapsed and refractory acute lymphoblastic leukemia. Haematologica 2006; 91(8):1105-1108.