Source:http://linkedlifedata.com/resource/umls/id/C2826345
NCI: A type of clinical study in which subjects are assigned to one of two treatment arms at the beginning of the trial and continue in that arm throughout the length of the trial. Study subjects are only exposed to the treatment that is assigned to the particular study arm they are enrolled in.,NCI: A type of study or trial in which subjects are assigned to a treatment arm at the beginning of the trial and continue in that arm throughout the length of the trial. Study subjects are only supposed to be exposed to the treatment that is assigned to the particular study arm they are enrolled in.,NCI: Participants are assigned to one of two or more arms in parallel for the duration of the study.