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Onset of hyperammonemic encephalopathy varied from 0 . 5 to 5 days ( mean : 2 . 6 + / - 1 . 3 days ) after the initiation of chemotherapy .
 Disease: hyperammonemic encephalopathy
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:
 Disease: hyperammonemic encephalopathy