Comparison of the revmoval of N-acetoxy-N-2-acetylaminofluorene adducts and pyrimidine dimers from the DNA of cultured human and mammalian cells: M.W. Lieberman, D.E. Amacher and J.A. Elliott, Somatic Cell Genetics Environmental Mutagenesis Branch, National Institutes of Health, Natl. Institute of Environmental Health Sciences, P.O. Box 12233, Research Triangle Park, N.C. 27709 (U.S.A.)