EP-1552: Robust optimization for IMPT of pencil-beam scanning proton therapy for prostate cancer. (May 2017) - Brouwer, C.L.; Matysiak, W.P.; Klinker, P.; Spijkerman-Bergsma, M.; Hammer, C.; Van den Bergh, A.C.M.; Langendijk, J.A.; Scandurra, D.; Korevaar, E.W.