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Abstract A radioresistant cell strain from human fibrosarcoma HT1080 has been obtained after prolonged exposure to x-rays for 7 months (2 Gy per day, 5 days per week). This new strain, HT1080R, differs from HT1080 in a significantly increased ability of clonogenical survival, with coefficient decreasing from 0.161 to 0.123 Gy1 and coefficient decreasing from 0.0950 to 0.0565 Gy2. Furthermore, the...
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