The nature of ageing, A.Brouwer; the scientific method and data assessment in biomedical gerontology, J.Mos and M.A.Horan; selection of subjects for ageing research, R.A.Fox and C.F.Hollander; an epidemiological approach to ageing research, S.Ebrahim; ageing at the molecular level - implications for clinical practice, J.Vijg and G.J.M.J.Horbach; a physiological approach to ageing, I.Davies; systems under stress - infectious agents and host defences, M.A.Horan et al; the role of nutrition in ageing, J.M.Prendergast and H.J.Armbrecht; ageing of the brain and Alzheimer`s disease, E.Goudsmit et al; the approach to a scientific paper, I.F.Greatorex.