Adverse drug reactions are appreciably harmful or unpleasant reactions resulting from an intervention related to the use of medical products, which predicts hazard from future administration and warrants prevention or specific treatment, or alteration of the dosage regimen, or withdrawal of the product. Given medical case reports extracted from MEDLINE, the task is to classify whether the case report mentions the presence of any adverse drug reaction. Classify your answers into non-adverse drug event and adverse drug event.

[EX Q]: A retrospective epidemiological study of deaths from hepatic angiosarcoma (HAS) in the U.S. showed that during 1964--74 there were 168 such cases, of which 37 (22%) were associated with previously known causes (vinyl chloride, 'Thorotrast', and inorganic arsenic) and 4 (3.1%) of the remaining 131 cases with the use of androgenic-anabolic steroids.
[EX A]: adverse drug event

[EX Q]: Clinical recovery required an average of 42 days and was complete in four of five patients.
[EX A]: non-adverse drug event

[EX Q]: OBJECTIVE: The purpose of this study was to report the concomitant occurrence of multiple squamous cell carcinomas and diffuse nail hyperpigmentation associated with hydroxyurea treatment, and to describe a successful therapeutic approach using imiquimod 5%.
[EX A]:
adverse drug event