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Metajournal has extensive search features allowing logged-in users to search within article titles – either from among the entire 1,115,719-articles index, or just a smaller slice.
Search... and enter your search terms in the box. Search within your Suggested Articles, your Favorites, articles from one Topic, or among articles from just one Journal.
From there you can widen the search to metajournal's entire article index, or then even perform the same search on PubMed.
And if that's not enough, you can also search metajournal's Collections and Notes too!