Okay, let me try to work through this step by step. The user is asking about the pathway enrichment analysis in the provided article. I need to look at the Methods section first because that's where they usually describe the analysis methods. First question: What tool was used for pathway enrichment analysis? The Methods section mentions that Ingenuity Pathway Analysis (IPA) was applied. So the answer here is IPA. Second question: Was a tool version number provided? I'll scan the text again. The article just says "Ingenuity Pathway Analysis (IPA)" without specifying a version. So probably not. Third question: What gene set library was queried? The tool is IPA, which typically uses its own curated database. However, the article doesn't mention which specific libraries or databases within IPA they used (like GO, KEGG, etc.). Since the answer is not explicitly stated, I should note that it's not described here. Fourth question: Was a background gene list defined? The Methods don't mention anything about defining a specific background gene list for the analysis. They just say they used IPA on the differentially expressed genes. So maybe they used the default in IPA, but since it's not stated, it's not described. Fifth question: Statistical test used. The Methods section says IPA was used but doesn't specify the statistical test. However, IPA usually uses Fisher's exact test for enrichment. But since the article doesn't mention it, I can't assume. The results mention p-values, so maybe it's Fisher's, but since the user wants only what's in the article, it's not described here. Sixth question: False discovery rate (FDR) correction? The article states "P < 0.05" for pathways, but doesn't mention FDR or any multiple testing correction in the Methods or Results regarding the pathways. So probably not addressed here. I should check other sections too. The Results talk about canonical pathways with P <0.05, but no mention of FDR. The Funding and other parts don't add info. So all answers except the first are "not described". 1. **Tool used for pathway enrichment analysis?** Ingenuity Pathway Analysis (IPA). 2. **Tool version number provided?** No, the version number was not specified. 3. **Gene set library queried?** Not explicitly described. IPA typically uses its proprietary knowledge base, but the specific libraries (e.g., GO, KEGG) were not mentioned in the article. 4. **Background gene list defined?** Not described. The method only states that IPA was applied to differentially expressed transcripts without specifying a defined background list. 5. **Statistical test used for enrichment analysis?** Not explicitly stated. IPA often uses Fisher’s exact test, but this detail was not provided in the article. 6. **False discovery rate (FDR) correction used?** No, the article mentions statistical significance thresholds (e.g., *P* < 0.05) for pathways but does not mention FDR correction or other methods to control false positives.