> Retrieval failure notice: No citable contexts were retrieved via `paper_search` or `gather_evidence` in this run, so a fully cited research report cannot be generated from tool-grounded sources.
>
> Suggested remediation: enable PubMed/Google Scholar retrieval, provide PDFs or DOI/PMID-linked full texts for the key papers, or allow external web access so the evidence can be verified and cited directly.


*Blockquote: This blockquote records that evidence retrieval failed, preventing a fully cited answer. It also lists practical next steps to restore source-grounded reporting.*