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Consort diagram of included patients. Tumor blocks from patients included in the original SweBCG91RT trial were recollected. TILs and histological grade were scored on whole tissue sections and PD-1/PD-L1 were scored on TMAs. PD-1, programmed cell death protein-1; PD-L1, programmed death ligand-1; RT, radiotherapy; TILs, tumor-infiltrating lymphocytes; TMA, tissue microarray.
