Effect of AE on growth of normal hematopoietic progenitor cells. CD34⁺ stem cells from 5 normal donors were cultured with media (▪) or with 0.5 (▨), 5.0 (▧), and 50 (░) μmol/L TAM. After 2 weeks, colonies of granulocyte-macrophages (CFU-GM), granulocyte erythrocyte monocyte macrophages (CFU-GEMM), and blood-forming units of erythroid lineage (BFU-E) were enumerated.P values denote comparison with cultures in media alone. *P < .05.