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: When a CPS perforates the transverse foramen, even if no apparent VA injury occurs during the operation, the surgeon must take care not to risk cerebral infarction because of an embolism.
Example Output: non-adverse drug event

Example Input: No explanation for this delay was found, other than the possibility that magnesium sulfate treatment impeded lactogenesis.
Example Output: adverse drug event

Example Input: Continuing the treatment with 13-cis-retinoic acid without systemic steroid eventually cleared the systemic manifestations and skin lesions.
Example Output:
non-adverse drug event

