Normo- or Hypo-Fractionated Photon or Proton Radiotherapy in the Management of Locally Advanced Unresectable Pancreatic Cancer: A Systematic Review. - Elkhamisy, Sally A.; Valentini, Chiara; Lattermann, Annika; Radhakrishna, Ganesh; Künzel, Luise A.; Löck, Steffen; Troost, Esther G. C. (Cancers, 2023)