https://pubmed.ncbi.nlm.nih.gov/15277908/
https://journals.lww.com/anesthesiology/fulltext/2004/08000/...
EDIT: It appears that every lww.com submission gets rewritten to the same URL since September 2024. Earlier ones seem to be correct. It's probably a weird interaction between the site and HN's URL rewriting scheme (usually based on canonical links). But the URL you've linked has a canonical link and it's the same URL you provided.
But I'll see if tagging @dang or @tomhow works...
Plus I've emailed.