Iron toxicosis, P.Aisen et al; host defences against copper toxicity, D.R.Winge and R.K.Mehra; chromium toxicity and carcinogenesis, J.A.Alcedo and K.E.Wetterhahn; the chemistry of dioxygen species (O2,O2, HOO, and HOOH) and their activation by transition metals, D.T.Sawyer; transition metal ions and oxygen radicals, S.Goldstein and G.Czapski; the cytopathology of metal overload, E.R.Alt et al.