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Twenty patients received 27 courses of ifosfamide administered as a 24 - hour continuous infusion for 14 days without Mesna .
 Chemical: ifosfamide; Chemical: Mesna
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: ifosfamide; Chemical: Mesna