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.

Example Input: The patient is currently under treatment with prednisone 20 mg/day for systemic lupus erythematosus and with oral mesalazine 2.4 mg/day for Crohn's disease.
Example Output: non-adverse drug event

Example Input: Adenomyosis confined to the broad ligament is extremely rare.
Example Output: non-adverse drug event

Example Input: Severe chronic active Epstein-Barr virus infection mimicking steroid-dependent inflammatory bowel disease.
Example Output:
non-adverse drug event