tokens: In this study we explored the effects of retinoic acid ( RA ) on apoptosis of human CD34+ hematopoietic progenitor cells isolated from normal bone marrow .
folded_tokens: in this study we explored the effects of retinoic acid ( ra ) on apoptosis of human cd34+ hematopoietic progenitor cells isolated from normal bone marrow .
labels: O O O O O O O O B-other_organic_compound I-other_organic_compound O B-other_organic_compound O O B-other_name O B-cell_type I-cell_type B-cell_type I-cell_type I-cell_type O O O O O O