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Global protein sulfhydryl levels were decreased significantly ( 48 . 4 % ) starting at 1 hour after the APAP dose and maintained at this reduced level through 24 hours .
 Chemical: sulfhydryl; Chemical: APAP
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: sulfhydryl; Chemical: APAP