How can I search for studies on a particular topic?

Enter your keyword(s) in the search bar found on the landing page. If no studies are found, please refine your search with similar but different terms. The search engine currently works best when searching for one topic at a time — including phrases. For example, while the keyword “depression” or the phrase “major depressive disorder” would both yield significant results, the phrase “depression and major depressive disorder” would not yield any.