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Thromboxane levels were not significantly affected by any of the treatments , indicating that the effects seen were attributable to inhibition of COX - 2 , but not COX - 1 .
 Chemical: Thromboxane
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: Thromboxane