tokens: Apoptosis is responsible for the removal of potentially autoreactive or useless T cells during thymic selection and activated T cells in the periphery .
folded_tokens: apoptosis is responsible for the removal of potentially autoreactive or useless t cells during thymic selection and activated t cells in the periphery .
labels: B-other_name O O O O O O O O O O O O O O O O B-cell_type I-cell_type I-cell_type O O O O