Median values and envelopes containing the central 68% and 95% distributions of generalized equivalent uniform dose (gEUD) (dots, solid, and dashed lines, respectively) at each log10(a), for patients with (red) and without (blue) radiation pneumonitis requiring steroids (RPS) in the joint data (eg, for the 24 patients with RPS or worse, the 68% and 95% bands show the 8th and 11th patients from the median). The right-hand y axis shows n (=1/a) in the Lyman-Kutcher-Burman model.