How do I check whether a briefing source appears in a later synthesis via Europe PMC?

Open the Europe PMC record for the source and inspect its citing-articles links for reviews or syntheses that include it, then read any later synthesis you find to see whether it changes how the briefing should characterize the source's findings. Europe PMC supports searches across life-science literature, grants, preprints, citations, references, and links to available full text, so the record page is the starting point for this check.

1. Locate the exact record. Search Europe PMC for the source by title, author, or identifier and open the matching record. Confirm the record matches the source cited in the briefing before following its links; a title match alone can point to a different version or a related paper.
2. Open the citing-articles links. On the record, follow the citations links to see which later papers cite this source. This is the direction that matters for a synthesis check: a citing article was published after the source and may have incorporated it.
3. Scan the citing list for reviews or syntheses. Look for citing items whose titles or article types indicate a review, systematic review, or synthesis. If none appear, the check is unresolved at this stage; record that no later synthesis was identified through this route and note the date you checked.
4. Read the synthesis for how it treats the source. If a later synthesis cites the source, read the passage where it is discussed to see whether the synthesis supports, qualifies, or reframes the source's findings. That passage, not the mere presence of a citation, determines whether the briefing's characterization should change.
5. Update the briefing or flag the gap. If the synthesis changes the interpretation, revise the briefing's wording and cite the synthesis alongside the original source. If the synthesis is consistent with the source, keep the characterization and note the corroborating synthesis.

Reference links serve a different check. The references list on the same record shows what the source itself cited. Use it to trace the source's own evidence base, not to find later syntheses; for the synthesis question, the citing-articles direction is the relevant one.

When the citing list is thin. A short or empty citing list leaves the question open rather than answering it negatively. In that case, search Europe PMC directly for review-type articles on the same topic and check whether they cite the source, and record the search terms and date so the check can be repeated later.