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Survival curves of (A) SWp and (B) SWg cells after radiation only (□); radiation + preincubation with 1 μM CPEC (▾); radiation + preincubation with 4 μM cisplatin (▴) and radiation + 1 μM CPEC + 4 μM cisplatin (○). Means with standard errors of at least three experiments are shown. Data of survival curves of combined treatments are corrected for the toxicity of CPEC only, cisplatin only and CPEC + cisplatin.
