This option is used for more complex searches. Clicking on Advance Search brings up a page with a tab for Search Manager. The drop down arrow gives the same options as for Basic Search. Use the Plus sign to add more search lines. The database offers suggestions; entering sickle cell brought up a list that included the subject "sickle cell diseases". Adding pain management as a second line found 67 items of which 36 were systematic reviews.
Add more lines to continue focusing the search.
Many databases give the searcher control over what should be returned in the results list. Examples include:
Entering a topic brings up a list of possibilities. Choosing from the list maps to the actual MeSH subject. For example, sickle cell diseases is mapped to anemia, sickle cell - the MeSH subject used in PubMed and CINAHL.
Clicking Lookup brings up three columns:
Click View Results to see the list of entries. Choose the radio button for Review to see only systematic reviews.