tokens: it became irreversible , however , upon simultaneous treatment with dexamethasone and transforming growth factor-beta 1 ( TGF-beta 1 ) , which did not induce differentiation of U937 cells but caused growth arrest of the cells in the G0/G1 phase of the cell cycle .
folded_tokens: it became irreversible , however , upon simultaneous treatment with dexamethasone and transforming growth factor-beta 1 ( tgf-beta 1 ) , which did not induce differentiation of u937 cells but caused growth arrest of the cells in the g0/g1 phase of the cell cycle .
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