Review articles give overviews on topics by discussing recent reseach studies and their findings. They can be good way to locate additional resources on that topic because they usually have long reference lists.
Here are some instructions for limiting your searches to review articles in different databases.
CAB: Enter your other search terms, and then type reviews in a search box.
Web of Science: Run your search, and then go to the Document Types menu in the Refine Results section to the left of the results list.. Click on Document Types. Select Review. You may have to click on the more options / values link to see if reviews are available.
PubMed: Run your search. Select Review or Systematic Review from the Article Types menu to the left of your results.