tokens: We introduce a new experimental system combining adenovirus -mediated gene transfer and fetal thymic organ culture ( FTOC ) .
folded_tokens: we introduce a new experimental system combining adenovirus -mediated gene transfer and fetal thymic organ culture ( ftoc ) .
labels: O O O O B-other_name I-other_name O B-virus O O O O B-other_artificial_source I-other_artificial_source I-other_artificial_source I-other_artificial_source O B-other_artificial_source O O