Based on Evidence is built on open scholarly infrastructure. These are the sources, the credit each one asks for, and when each was last synchronised. Abstracts and full texts are shown only where the article’s own licence allows it.
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Data current as of 25 Oct 2026
Courtesy of the U.S. National Library of Medicine
Bibliographic records, publication types, correction and retraction notices. This site is not endorsed by or affiliated with the NLM.
Some abstracts may be protected by copyright. An abstract is shown here only when the article's licence allows it; otherwise the page links to PubMed.
Last synced 25 Oct 2026. Terms of use
Europe PMC (europepmc.org), a service of the Europe PMC Funders' Group
Open-access licence information, full texts of openly licensed articles.
Full text is used only for articles whose licence allows it.
Last synced 25 Oct 2026. Terms of use
Metadata from Crossref (crossref.org)
DOI metadata, licence statements and update notices (retractions, corrections).
Crossref metadata is openly available.
Last synced 25 Oct 2026. Terms of use
Retraction data from the Retraction Watch database (Center for Scientific Integrity)
Retraction notices, joined to our records by DOI and PMID.
Used to flag retracted papers. The database itself is not republished here.
Last synced 25 Oct 2026. Terms of use
OpenAlex (openalex.org)
Open-access status and retraction flags, as corroboration only.
An OpenAlex flag alone never opens a licence or marks a paper retracted.
Last synced 25 Oct 2026. Terms of use