tokens: The modified vectors were used to transduce human hematopoietic cell lines , cord blood-derived CD34 ( + ) stem/progenitor cells , and murine bone marrow repopulating stem cells .
folded_tokens: the modified vectors were used to transduce human hematopoietic cell lines , cord blood-derived cd34 ( + ) stem/progenitor cells , and murine bone marrow repopulating stem cells .
labels: O B-virus I-virus O O O O B-cell_line I-cell_line I-cell_line I-cell_line O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O