C. Beta lesions of the skin, epilation 12 D. Internal absorption of radioactive isotopes 12 B. Late effects 15 2. Shortening of life span a. Premature ageing 16 3. Dezenerative diseases, malignancies 16 4. Gphthaimelogical findings 37 5. Genetic effects i7 6. Beta irradiation of the skin 77 Fe Body burdens of radioactive isotopes