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Effect of chemical inhibition of nicotinamide phosphoribosyltransferase (NAMPT) on the pharmacological activity of methotrexate (MTX). Cell viability was determined in A549 cells treated for 48 h with MTX before the addition of 2.5 nM FK‐866 or vehicle control for an additional 72 h. Data points represent the mean ± SD of viability measurements conducted in a single experiment with three independent replicates.
