Summary
The Forum, held in London on 4 November 1992, was organized by the Medical Research Council's Committee on the Effects of Ionizing Radiation (CEIR). Sessions were chaired by Dr R. J. Berry (Director, Westlakes Research Institute, Cumbria), and papers were presented by Professors A. J. van der Kogel, A. Barrett, J. S. Greenberger, D. Linch, and K. R. Trott, and Drs C. S. Potten, J. Thacker, F. R. Balkwill, E. G. Wright, and J. J. Oppenheim.