Where to begin, for clinicians
Every letter, checkable to its source.
Every grade on EBL points to its trials by PMID PubMed ID: the permanent number the US National Library of Medicine gives a published paper. Each one links to that paper's record on PubMed., for one use at a time. This page shows where the rules are written, how to verify a letter, how changes are logged, and the tools built for a short visit.
Four steps
From the rules to the exam room.
Where the rules are written.
How grades work sets out what each letter requires, the endpoint The outcome a trial measures to decide whether the treatment worked, such as heart attacks, blood pressure or a symptom score. ceiling and the two routes to D. The methodology page has the six rules and the evidence flags, and How EBL works puts the method on one page.
Verifying a letter.
Each record lists its PMIDs with the dose, population and duration as studied. Evidence integrity shows what the build checks and what is still open, the citation audit lists every defective citation EBL found in its own work, and the completeness check shows which large trials each record was checked against.
What changed, and why.
The Evidence Log records every grade change with the study behind it. Editorial standards explains review, corrections and how to submit one.
Tools for a short visit.
The Medication and Supplement Check and the Physician Discussion Sheet turn a patient's list into one PMID-cited page. For clinicians walks through them, and EBL Clinical is the paid plan for clinicians.
Limits, stated
A letter describes the trials.
EBL makes no treatment recommendation. Trial summaries describe published research, and every decision stays with the clinician and the patient. EBL's position says this in full.
Where money touches the site, the disclosure page says so. Landmark trials sets out what each of the large trials established and what it did not.
Further reading
Where to go after the basics.
Every letter is checkable, down to the trial.
Grades are set from the published evidence. Educational use only, not medical advice.