1. From the Hematology and Bone Marrow Transplantation Unit, University of Perugia; the International Cancer Center, Laboratory of Molecular Biology, Rovigo; the Department of Experimental and Diagnostic Medicine and Interdepartment Center for Cancer Research, University of Ferrara, Italy; the Department of Hematology, Sant Pau University Hospital, Barcelona; and the Department of Hematology, Vall d'Hebron Hospital, Barcelona, Spain.