Here are the answers to the questions based on the information provided in the article:

1. **What tool was used for pathway enrichment analysis?**
   - The article does not explicitly state the tool used for pathway enrichment analysis. However, the KEGG pathways were mentioned, which are a database for pathway enrichment analysis.

2. **Was a tool version number provided?**
   - Not described.

3. **What gene set library was queried (eg: GO, KEGG, Reactome or other)?**
   - KEGG.

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

5. **What statistical test was used for enrichment analysis?**
   - Not described.

6. **Was false discovery rate correction used to control the number of false positives in the pathway enrichment analysis?**
   - Not described.

These answers reflect the level of detail provided in the article regarding the pathway enrichment analysis. The article does not provide sufficient details regarding the pathway enrichment analysis.