Source:http://linkedlifedata.com/resource/umls/id/C1997894
NCI: A person volunteering to participate as a subject in a clinical trial, often a healthy person agreeing to participate in a Phase 1 trial. See also Phase 1.,NCI: A living person who is observed, analyzed, examined, investigated, experimented upon, and/or treated in the course of a clinical trial. This includes studies where an investigator obtains identifiable private information or data through the intervention or interaction with the individual.