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PubMed 2743445
Digital library NLK Source Source
PubMed 3581143
PubMed 3955772
Digital library NLK Source
PubMed 6414726
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AND or + signifies AND operation (intersection)
AND
+
OR or | signifies OR operation (union)
OR
|
- negates a single word
-
" wraps text to signify a phrase
"
* at the end of a term signifies a right-side expansion
*
( and ) signify precedence
(
)
~N after a word signifies edit distance (fuzziness)
~N
~N after a phrase signifies words distance
