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OBJECTIVE : To document a case of serotonin syndrome ( SS ) associated with mirtazapine monotherapy , review the previously reported cases of SS associated with this tetracyclic antidepressant , and discuss the possible pathogenic mechanisms leading to this serious adverse drug reaction .
 adverse effect: serotonin syndrome, mirtazapine; adverse effect: SS, mirtazapine
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:  serotonin syndrome, mirtazapine; SS, mirtazapine 
Answer:
 adverse effect: serotonin syndrome, mirtazapine; adverse effect: SS, mirtazapine