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Model fit quality of Vx model for all dose levels (x), estimated by the log likelihood divided by the number of patients in the model fit. Higher values indicate better fit to the clinical data. Black line: All patients in cohort. Dashed, blue line: Patients treated with 3D conformal (3D-CRT) treatment plans. Dotted, green line: Patients treated with intensity-modulated radiotherapy (IMRT) treatment plans.
