Under an association contract linking the Co~ission of the European Communities and the Gesellschaft fUr Strahlen- und Umweltforschung mbH, a research programme on the patho- genesis of somatic radiation damage has been under way for a number of years. Experimental research on long-term radiation effects following the incorporation of bone-seeking radionuclides and an epidemiological study of the conse- quences for patients treated with 224Ra for therapeutical reasons have been among the main features of the work. The research carried out on tumor induction in the low dose range and for low...