We further evaluated the infiltrating scores of 16 immune cells and the activities of 13 immune-related pathways with the single-sample gene set enrichment analysis (ssGSEA) in the "gsva" R package [18]. The annotated gene set file is provided in Additional file 2: Table S2. Moreover, the relationships between immune cells and prognostic genes were explored through TIMER database (https://cistrome.shinyapps.io/timer/).
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