( 4 ) Intrafollicular CD57+ cells were negative for Bcl-6 , indicating heterogeneity of the intrafollicular T-cell population .
( 4 ) intrafollicular cd57+ cells were negative for bcl-6 , indicating heterogeneity of the intrafollicular t-cell population .
O O O B-cell_type I-cell_type I-cell_type O O O B-protein_molecule O O O O O B-cell_type I-cell_type I-cell_type O