Proportion of AML peripheral blood cells and progenitors expressing CD34 and HLA-DR antigens in 11 patients (patients 1, 2, 4, 5, 7, 8, 10, 11, 13, 15, and 19). □), CD34⁺/HLA-DR⁺; (▪), CD34⁺/HLA-DR⁻; (▩), CD34⁻.