PD-0543: An externally validated prognostic CT radiomics model for head and neck cancer patients. (November 2020) - Keek, S.; Sanduleanu, S.; Woodruff, H.C.; Wesseling, F.; Mattavelli, D.; Ravanelli, M.; Hoffman, T.K.; Scheckenbach, K.; Leemans, C.R.; De Graaf, P.; Terhaard, C.; Van de Kamer, J.; et al.