tokens: DESIGN AND METHODS : The effect of all-trans and 9-cis RA on HIV-1 production in T-lymphoid ( H9 , CEM ) and monocytoid ( U937 , THP-1 ) cell lines was measured during acute and chronic infection .
folded_tokens: design and methods : the effect of all-trans and 9-cis ra on hiv-1 production in t-lymphoid ( h9 , cem ) and monocytoid ( u937 , thp-1 ) cell lines was measured during acute and chronic infection .
labels: O O O O O O O O O O O O B-virus O O B-cell_line O B-cell_line I-cell_line I-cell_line O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O O O O O O O O