“…The most widely studied examples of differentiation antigens currently being used for targeted therapy are expressed by hematopoietic malignancies, and include CD-20, CD-22 and CD-30 on B-cell lymphomas CD-33, CD-38, CD-45 and CD-64 on acute myeloid leukemias (AML) and the upregulated interleukin (IL-)-2 receptor on T-cell leukemias (Favaloro et al, 1987;Waldmann et al, 1992;Sacchi et al, 2001;Waldmann, 2002;Tur et al, 2003;Leonard et al, 2004;Matthey et al, 2004;Mehta et al, 2004;Sperr et al, 2005).…”