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Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis at level 1 (A), level 2 (B), and level 3 (C). Statistically significant KEGG pathways of the normoxia, hypoxia-induced and MSC-treated groups were determined by STAMP software, and LEfSe (LDA score > 2) of significant KEGG pathways was performed.
