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Clonogenic survival fraction of U87-MG in vitro after single-doses of irradiation (mean + s.d., n=3) and unconstrained best-fit curve with α=0.3859 and β=0.01148. Survival curves plotted for estimated radioprotection factors of GSC (λ=0.1376) and quiescent CC/GSC (ξ=0.5).
