Source:http://linkedlifedata.com/resource/umls/id/C1879937
NCI: A social group characterized by a distinctive social and cultural tradition maintained from generation to generation, a common history and origin and a sense of identification with the group; members of the group have distinctive features in their way of life, shared experiences and often a common genetic heritage; these features may be reflected in their experience of health and disease. (NCI),NCI: Terminology codelist used with Ethnic Group within the Clinical Data Interchange Standards Consortium Study Data Tabulation Model.