tokens: The human monoblastic cell line , U937 was differentiated to macrophages by the treatment with either phorbol 12-myristate 13-acetate ( PMA ) , retinoic acid ( RA ) , or vitamin D3 ( VitD3 ) .
folded_tokens: the human monoblastic cell line , u937 was differentiated to macrophages by the treatment with either phorbol 12-myristate 13-acetate ( pma ) , retinoic acid ( ra ) , or vitamin d3 ( vitd3 ) .
labels: O B-cell_line I-cell_line I-cell_line I-cell_line O B-cell_line O O O B-cell_type O O O O O B-other_organic_compound I-other_organic_compound I-other_organic_compound O B-other_organic_compound O O B-other_organic_compound I-other_organic_compound O B-other_organic_compound O O O B-lipid I-lipid I-lipid B-lipid O O