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Research: Boolean Operators

Boolean Operators

Boolean Operators - AND, OR, and NOT - allow combining or excluding search terms.

Always enter in uppercase letters.


Addiction AND Opioids

Retrieves citations that contain

both search terms; fewer citations


Sun Exposure OR Sunlight

Retrieves citations that contain

either search terms; more citations


Dementia NOT Alzheimer’s

Excludes citations containing the

second search term; fewer citations