Th2 cells could be induced in all healthy controls by priming with anti-CD28 in the absence of TCR ligation .
th2 cells could be induced in all healthy controls by priming with anti-cd28 in the absence of tcr ligation .
B-cell_line I-cell_line O O O O O O O O O O B-protein_family_or_group O O O O B-protein_family_or_group O O