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National Cancer Research Institute Clinical and Translational Radiotherapy Research Working Group (CTRad) Proton Beam Clinical Trial Strategy Group.National Cancer Research Institute Clinical and Translational Radiotherapy Research Working Group (CTRad) Proton Beam Clinical Trial Strategy Group.Clin Oncol (R Coll Radiol). 2018 May;30(5):280-284. doi: 10.1016/j.clon.2018.02.031. Epub 2018 Mar 16.Clin Oncol (R Coll Radiol). 2018.PMID: 29551566