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Kaplan‐Meier overall survival curves of different radiotherapy methods treated patients vs control (A) before and (B) after propensity score matching. 0 = Control; 11 = Beam radiation; 12 = Radioactive implants; 13 = Radioisotopes; 14 = Combination of beam with implants or isotopes; 15 = Radiation, NOS method or source not specified
