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Two patients who developed decreased visual acuity after several months of ethambutol treatment for Mycobacterium avium - intracellulare infection had bitemporal visual field defects that suggested optic chiasm damage .
 bitemporal visual field defects, ethambutol; decreased visual acuity, ethambutol
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 bitemporal visual field defects, ethambutol; decreased visual acuity, ethambutol