4559
Mean peak concentrations were markedly different : 11 . 00 + / - 2 . 89 microg / ml in OD vs . 6 . 53 + / - 1 . 45 microg / ml in TD ( P < 0 . 01 ) .
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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:
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