tokens: We extended these studies using a novel primary human adult erythroid cell ( hAEC ) system to investigate these effects at the late erythroblast stage .
folded_tokens: we extended these studies using a novel primary human adult erythroid cell ( haec ) system to investigate these effects at the late erythroblast stage .
labels: O O O O O O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O B-cell_line O O O O O O O O B-cell_type I-cell_type I-cell_type O