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Table 1 Journal name search terms used in primary MEDLINE search

From: Failure to report protocol violations in clinical trials: a threat to internal validity?

Journal

Medical Subject Heading Terms

The Lancet

("Lancet"[Journal] OR "lancet"[All Fields])

New England Journal of Medicine

"N Engl J Med"[Journal]

Journal of the American Medical Association

("JAMA"[Journal] OR "jama"[All Fields])

British Medical Journal

("Br Med J"[Journal] OR "Br Med J (Clin Res Ed)"[Journal] OR "BMJ"[Journal] OR "bmj"[All Fields])