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Gene set enrichment analysis of the GTEx dataset comparing the young (20–59 years) and old (60–79 years) groups: (A,B) hallmark, (C,D) KEGG, and (E,F) Reactome. (A,C,E), positive enrichment; (B,D,F), negative enrichment. The top 10 hallmarks or pathways are listed. NES, normalized enrichment score.
