Here are the answers to your questions based on the provided scientific article:

1. **What tool was used for pathway enrichment analysis?**
   - The authors used GSEA (Gene Set Enrichment Analysis) 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?**
   - The authors used the MSigDB gene sets for pathway enrichment analysis.

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.