Here is the information regarding pathway enrichment analysis from the article:

1. **What tool was used for pathway enrichment analysis?**
   - The article does not specify a single tool used for pathway enrichment analysis. However, R package piano_1.16.4 was applied for KEGG enrichment analysis.

2. **Was a tool version number provided?**
   - Yes, version 1.16.4.

3. **What gene set library was queried (e.g., GO, KEGG, Reactome or other)?**
   - KEGG gene sets from MSigDB were queried.

4. **Was a background gene list defined for pathway enrichment analysis?**
   - Not described.

5. **What statistical test was used for enrichment analysis?**
   - Fisher’s exact test

6. **Was false discovery rate correction used to control the number of false positives in the pathway enrichment analysis?**
   - Yes, Benjamini-Hochberg correction was applied.