At the query box, enter a word or phrase to search. PubMed uses Automatic Term Mapping (ATM) that matches terms to Medical Subject Headings (MeSH), journal titles, a phrase list, or an author index in that order. If the term is not matched, it is searched in all fields.
The automatic term mapping (ATM) mechanism matches your term(s) to PubMed's Medical Subject Headings (MeSh). You can type directly in the SEARCH DETAILS box to adjust your search terms if necessary.