Gertjan J. L. KASPERS is Professor and Head of the Division of Oncology/Hematology, VU University Medical Center, Amsterdam, Netherlands. Dr. Kaspers received his M.D. from the Vrije Universiteit, Amsterdam, Netherlands, and his Ph.D. from the VU University Medical Center, Amsterdam, Netherlands. His current research covers a randomized phase III study on the treatment of children and adolescents with refractory or relapsed acute myeloid leukemia, a phase II study on Mylotarg in childhood relapsed and refractory AML, an international study on the treatment of Pediatric Acute Promyelocytic Leukemia, clinical phase II studies with clofarabine-containing regimens in pediatric acute myeloid leukemia, and a clinical phase II study with bortezomib in pediatric acute lymphoblastic leukemia in preparation. BERTRAND COIFFIER is Professor and Chief of Hematology, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon and Claude-Bernard University, Pierre-Benite, France. Dr. Coiffier has written more than 300 publications in internationally recognized, leading journals in the field of hematology on lymphomas, lymphoproliferative diseases, chemotherapy, high-dose therapy, and autotransplant, biological response modifiers. MICHAEL C. HEINRICH is Professor of Medicine, Oregon Health & Science University, Division of Hematology & Medical Oncology, Portland, Oregon, USA; Chairman, Portland VA Medical Center Tumor Board, Section Chief, Hematology Oncology, Portland VA Hematology/Medical Oncology Service, Portland, Oregon, USA; and Interim Head, Hematology & Medical Oncology, Oregon Health & Science University, Portland, Oregon, USA. Dr. Heinrich received his M.D. from the Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. ELIHU ESTEY is Professor of Hematology in the Division of Medicine at the University of Washington Medical Center and a Member at the Fred Hutchinson Cancer Research Center, Seattle, Washington, USA. Dr. Estey received his A.B. from Yale University, New Haven, Connecticut, USA, and his M.D. from Johns Hopkins University, Baltimore, Maryland, USA.