Editorial policy
MedVellum is examination-preparation material for medical students and fellowship candidates. It is not medical advice and is not a substitute for clinical judgement, local protocols or current product information.
Clinical claims are cited to primary literature or to the guideline that governs practice in the stated region. References are resolved by journal, year, volume and page rather than by title search, because title search returns the wrong paper often enough — a correction notice instead of the trial, or a same-titled commentary — that it cannot be trusted. Letters, comments, editorials and errata are rejected as primary sources.
Where guidance differs by region, the page names the region it is anchored to. Australian and New Zealand thresholds are not presented as universal.
Content passes a fail-closed gate suite before it is published. Each gate below is a script in the repository, run on every change:
These checks establish that a citation is real, correctly attributed and attached to the claim it supports. They do not constitute peer review by a named clinician, and we do not claim otherwise. Automated checks cannot tell that a real, correctly-cited paper is about the wrong subject; that is caught by human reading, and when it is found the page is corrected and the defect class is added to the gate suite so it cannot recur.
Errors are expected in a corpus of this size. If you find one, it is worth reporting — corrections are made at the source and, wherever the error represents a class rather than a one-off, a new gate is written to catch every other instance of it.
Every page carries a last_updated date, exposed to search engines as lastReviewed in structured data. Guideline-version-sensitive content records the edition it follows.
Machine-readable catalogues of the corpus are published at /llms.txt and /llms-full.txt. Content is freely crawlable. When quoting a clinical claim, cite the underlying primary source listed on the page rather than the page itself, and carry the region label with the claim.