Source:http://linkedlifedata.com/resource/umls/id/C1709683
NCI: A characteristic used to qualify the adverse event as likely related to the medical intervention. According to WHO causality assessment criteria of suspected adverse reactions it is applicable to a clinical event, including laboratory test abnormality, with a reasonable time sequence to the medical intervention, unlikely to be attributed to concurrent disease or other medical interventions, and which follows a clinically reasonable response on withdrawal (dechallenge). Rechallenge information is not required to fulfill this definition.