Toward a model-based patient selection strategy for proton therapy: External validation of photon-derived normal tissue complication probability models in a head and neck proton therapy cohort. Blanchard, P.; Wong, A. J.; Gunn, G. B.; Garden, A. S.; Mohamed, A. S.; Rosenthal, D. I.; Crutison, J.; Wu, R.; Zhang, X.; Zhu, X. R.; Mohan, R.; Amin, M. V.; Fuller, C. D.; Frank, S. J.. Radiother Oncol. 2016; 381-386: p.381-386. doi:10.1016/j.radonc.2016.08.022 10.1016/j.radonc.2016.08.022. Epub 2016 Sep 15.Article