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Cytotoxicity of TDF and TFD adducts. MT-4 cells were incubated with the compounds for 72 h, after which viability was determined using the MTT test. For TDF, absorbance values corresponding to 100% viability were obtained by culturing untreated cells; in the case of the adducts, the cells were cultured in the presence of equivalent concentrations of the corresponding mPEG-b-PEPA copolymers.
