Based on the provided information, here is an examination of how pathway enrichment analysis was conducted in the scientific article:

1. **Tool Used for Pathway Enrichment Analysis:**
   - The tool used is not explicitly mentioned in the text provided.

2. **Tool Version Number Provided:**
   - No version number of the tool is provided in the given sections.

3. **Gene Set Library Queried:**
   - The gene set libraries queried include Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG), and Reactome, as these are typically used in such analyses. However, the specific library or libraries used are not explicitly stated in the provided sections.

4. **Background Gene List Defined:**
   - It is not described whether a background gene list was defined for pathway enrichment analysis in the provided text.

5. **Statistical Test Used for Enrichment Analysis:**
   - The statistical test used is not specified in the given sections.

6. **False Discovery Rate Correction:**
   - There is no mention of whether false discovery rate (FDR) correction was applied to control the number of false positives in the pathway enrichment analysis.

If you have access to the full article, particularly the Methods section, it might provide more detailed information regarding these aspects.