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Jensen, P.B., et al.1990.Antagonistic Effect of Aclarubicin on the Cytotoxicity of Etoposide and 4'-(9-acridinylamino)-methanesulfon-m-anisidide in Human Small Cell Lung Cancer Cell Lines and on Topoisomerase II-Mediated DNA Clev. Cancer Res,50:3311-3316.