In the Emtree, we can find the definition of Dorland's medical dictionary is used to explain the meaning of terms.
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We can use “combine”function to match two retrieval strategies.
Search field of Drug search is drug name in EMbase search.
Search field of Disease search is disease name Search field of Drug search is drug name.
The use of EMtree includes:
A. Search extension words to prevent missing
Browse the hyponyms of extension words
C. Find indexing preferences
D. The key words are determined by term information
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