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Text File  |  1992-01-24  |  322b  |  3 lines
  1. Applies ALL subheadings to selected term. Records indexed with ANY subheading will be found, as well as records with no subheadings.
  2. Search for records containing the term with NO subheadings attached to the MeSH heading. This search will retrieve general articles that do not pinpoint any specific aspect of the topic.
  3.