Union of https://www.nlm.nih.gov/mesh and https://www.nlm.nih.gov/mesh

This is the CodeSystem that contains all the codes in Medical Subject Headings (https://www.nlm.nih.gov/mesh) and Medical Subject Headings (https://www.nlm.nih.gov/mesh). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: CodeSystem 21d0d52d-6932-4516-ad29-944d62abcb69-353

This code system http://hl7.org/fhir/comparison/CodeSystem/21d0d52d-6932-4516-ad29-944d62abcb69-353 defines codes, but no codes are represented here

Code