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Safwat A, Nielsen OS, abd el-Bakky H, Overgaard J.Safwat A, et al. Among authors: overgaard j.Radiother Oncol. 1995 Mar;34(3):203-9. doi: 10.1016/0167-8140(95)01518-l.Radiother Oncol. 1995.PMID: 7631026