2597
PURPOSE : To describe spectral - domain optical coherence tomography ( SD - OCT ) and adaptive optics ( AO ) imaging in hydroxychloroquine retinal toxicity .
 adverse effect: retinal toxicity, hydroxychloroquine
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  retinal toxicity, hydroxychloroquine 
Answer:
 adverse effect: retinal toxicity, hydroxychloroquine