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Figure 1. Effect of long-term FR on cell growth. Cell growth of un-irradiated cells (open circles) and cells exposed to 0.01-Gy (open triangles), 0.05-Gy (open squares), 0.5-Gy (closed circles), 1-Gy (asterisks), and 2-Gy (open diamonds) fractions. Growth curves for WI-38, MRC5, and TIG3 cells are shown.
