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Research & Publication for Medicine & Health

 

Boolean Operators

AND narrows a search (more precise; fewer articles retrieved)

  • use to combine distinct concepts that must all be represented in resulting articles
    • condition/etiology AND risk factor
    • condition AND screening
    • condition AND population

OR broadens a search (more inclusive; more items retrieved)

  • use to combine synonyms or related terms for a single concept
    • condition/etiology  OR condition/prevention and control