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Fatal radiation myelopathy after high - dose busulfan and melphalan chemotherapy and radiotherapy for Ewing 's sarcoma : a review of the literature and implications for practice .
 adverse effect: Fatal radiation myelopathy, busulfan; adverse effect: Fatal radiation myelopathy, melphalan
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: Fatal radiation myelopathy, busulfan; adverse effect: Fatal radiation myelopathy, melphalan