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: This avoids the need for bronchoscopic examination or transfer of the patient for computed tomography.
Example Output: non-adverse drug event

Example Input: INTRODUCTION: Despite high success rates with free-tissue transfer, flap loss continues to be a devastating event.
Example Output: non-adverse drug event

Example Input: Despite reduction in immunosuppression, 30%-40% of recipients progress to allograft loss.
Example Output:
non-adverse drug event