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[Chromosomal changes following irradiation with small doses (author's transl)].

The authors examined the chromosomes of 20 patients who underwent thyroid investigations. Leucocyte cultures from peripheral blood were studied immediately before the indtroduction of 131I, and again after 48 hours. The results indicate that a total body dose of 0.05 rad increases chromatid damage as well as increasing the incidence of labile chromosome changes.