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The drug resistance of leukemic cells from 21 patients with chronic lymphocytic leukemia (CLL) to the alkylating agent chlorambucil (CLB) and the nucleoside analog cladribine or 2-chlorodeoxyadenosine (CdA) was investigated by infrared spectroscopy. Drug sensitivities, determined in vitro with the tetrazolium dye (MTT) assay, were correlated with the infrared spectra of the CLL cells, applying linear...
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