tokens: In August , 1992 , we established a leukemic cell line ( NS-Meg ) from a patient in megakaryoblastic transformation of Philadelphia chromosome-positive chronic myeloid leukemia .
folded_tokens: in august , 1992 , we established a leukemic cell line ( ns-meg ) from a patient in megakaryoblastic transformation of philadelphia chromosome-positive chronic myeloid leukemia .
labels: O O O O O O O O B-cell_line I-cell_line I-cell_line O B-cell_line O O O O O B-other_name I-other_name O B-other_name I-other_name I-other_name I-other_name I-other_name O