tokens: Correlation of differentiation-inducing activity of retinoids on human leukemia cell lines HL-60 and NB4 .
folded_tokens: correlation of differentiation-inducing activity of retinoids on human leukemia cell lines hl-60 and nb4 .
labels: O O B-other_name I-other_name O B-other_organic_compound O B-cell_line I-cell_line I-cell_line I-cell_line B-cell_line O B-cell_line O