Ethics Approval SCDO None Request inclusion into relevant ontology A document containing the determination of the Research Ethics Committee (REC) that the clinical study with human subject participation has been reviewed and may be conducted at a particular study site within the constraints set forth by the REC and other institutional and federal requirements. The regulations require that an REC conduct continuing review of research at intervals appropriate to the degree of risk, but not less than once a year. Research Characteristics Ethics Related Concept