D.J. McConkey, T.Y. Aw, and S. Orrenius, Role of the Ca2+-Mediated Endonuclease Activation in Chemical Toxicity. W.N. Aldridge, Selective Neurotoxicity: Problems in Establishing the Relevance of in Vitro data to the in Vivo Situation. J.E. Casida and R.F. Toia, Organophosphorous Pesticides: Their Target Diversities and Bioactivation. U. Andrae and H. Greim, Initiation and Promotion in Thyroid Carcinogenesis. W. Bursch, L. Fesus, and R. Schulte-Hermann, Apoptosis ('Programmed' Cell Death) and its Relevance in Liver Injury and Carcinogenesis. P. Steinberg and F. Oesch, Liver Cell Specific Toxicity of Xenobiotics. H.-G. Neumann, S. Ambs, and W. Hillesheim, The Biochemical Basis of Hepatotoxicity. W. DeKant, S. Vamvakas, and M.W. Anders, The Kidney as a Target Organ for Xenobiotics Bioactivated by Glutathione Conjugation. G.S. Yost, Bioactivation and Selectivity of Pneumotoxic Chemicals. M.E. Scheulen and H. Kappus, Anthracycines as Model Compounds for Cardiac Toxicity. Index.