The choice of which terms to enter for your search, especially in PubMed, requires you to build what is known as a search strategy.
This entails
Using the PICO formula may help to build a good search strategy.
Why Use PICO?
Minutes spent properly formulating your question will save you hours in searching (and help you to get better marks in your IR OSCE stations!).
Constructing a Clinical Question using PICO
The PICO model will help you to construct your "foreground" clinical questions.
Scenario