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This study shows that busulfan neurotoxicity is dose - dependent in children and efficiently prevented by clonazepam .
 Chemical: busulfan; Disease: neurotoxicity; Chemical: clonazepam
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: busulfan; Disease: neurotoxicity; Chemical: clonazepam