AKT1 and leukemia: Subanalysis of leukemia blasts derived from bone marrow aspirates (n=23) versus peripheral blood specimens (n=39 (Ser473) or n=38 (Thr308)) revealed no significant difference of phospho-AKT expression at codon Thr308 (p = 0.06) as well as Ser473 (p = 0.09).