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In the present study , oxygen radical production in patients with ALF due to paracetamol overdose was compared with that of healthy volunteers .
 Chemical: oxygen; Disease: ALF; Chemical: paracetamol; Disease: overdose
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: oxygen; Disease: ALF; Chemical: paracetamol; Disease: overdose