tokens: Although erythropoietin ( Epo ) is essential for the production of mature red blood cells , the cooperation with other factors is required for a proper balance between progenitor proliferation and differentiation .
folded_tokens: although erythropoietin ( epo ) is essential for the production of mature red blood cells , the cooperation with other factors is required for a proper balance between progenitor proliferation and differentiation .
labels: O B-protein_family_or_group O B-protein_family_or_group O O O O O O O B-cell_type I-cell_type I-cell_type I-cell_type O O O O O O O O O O O O O B-other_name I-other_name O B-other_name O