PubMed source
Caveats:
- MeSH → Emtree mapping uses a small built-in dictionary. Unmapped MeSH are emitted as free-text with a warning comment.
- Embase
/expexpands to narrower terms; PubMed MeSH major ≠ Embase major descriptors — review carefully. - Proximity operators (
ADJn,NEAR) are not converted; use manual tuning.