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Relapse in the external auditory canal of acute promyelocytic leukemia after treatment with all - trans retinoic acid .
 adverse effect: Relapse in the external auditory canal of acute promyelocytic leukemia, all - trans retinoic acid
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:  Relapse in the external auditory canal of acute promyelocytic leukemia, all - trans retinoic acid 
Answer:
 adverse effect: Relapse in the external auditory canal of acute promyelocytic leukemia, all - trans retinoic acid