pubmed-databaselisted

# PubMed Database Use this skill when a task needs biomedical literature from PubMed rather than general web search. ## When to Use - Searching MEDLINE or life-sciences literature - Building PubMed queries with MeSH terms, field tags, dates, or article types - Looking up PMIDs, abstracts, publication metadata, or related citations - Using NCBI E-utilities directly from Python, shell, or another HTTP client ## Query Construction Combine concepts with Boolean operators (`AND`, `OR`, `NOT`). ### PubMed field tags - `[ti]`: title - `[ab]`: abstract - `[tiab]`: title or abstract - `[au]`: author - `[ta]`: journal title abbreviation - `[mh]`: MeSH term - `[majr]`: major MeSH topic - `[pt]`: publication type - `[dp]`: date of publication - `[la]`: language - `[nm]`: substance name Examples: ```text diabetes mellitus[mh] AND treatment[tiab] AND systematic review[pt] AND 2023:2026[dp] (metformin[nm] OR insulin[nm]) AND diabetes mellitus, type 2[mh] AND randomized controlled trial[pt] smith ja[au] AND cancer[tiab] AND 2026[dp] AND english[la] ``` ## MeSH and Subheadings Prefer MeSH when the concept has a stable controlled-vocabulary term. Combine MeSH with title/abstract terms when the topic is new or terminology varies. Correct subheading syntax puts the subheading before the field tag: ```text diabetes mellitus, type 2/drug therapy[mh] cardiovascular diseases/prevention & control[mh] ``` Use `[majr]` only when the topic must be central to the paper — improves precision