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Use Boolean operators: AND/OR
diabetic AND foot
diabetes OR diabetic
Exclude a word using the 'minus' sign
Virchow -triad
Use Parentheses
water AND (cup OR glass)
Add an asterisk (*) at end of a word to include word stems
Neuro* will search for Neurology, Neuroscientist, Neurological, and so on
Use quotes to search for an exact phrase
"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"