1389
These are the first reported patients to show mfERG abnormalities that correspond to bitemporal visual field defects and add to the growing evidence that ethambutol damages the retina.
 adverse event: evidence 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: evidence 