An essential role for NF-kappaB in human CD34 ( + ) bone marrow cell survival .
an essential role for nf-kappab in human cd34 ( + ) bone marrow cell survival .
O O O O B-protein_complex O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O