DESIGN : Infected promyelocytic and promonocytic cells were examined because they normally express both types of TNF receptors .
design : infected promyelocytic and promonocytic cells were examined because they normally express both types of tnf receptors .
O O O B-cell_type O B-cell_type I-cell_type O O O O O O O O O B-protein_family_or_group I-protein_family_or_group O