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Studies were performed to examine the mechanisms for the protective effects of free radical scavengers on gentamicin ( GM ) - mediated nephropathy .
 Chemical: gentamicin; Chemical: GM; Disease: nephropathy
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: gentamicin; Chemical: GM; Disease: nephropathy