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In contrast , maximal platelet aggregation increased in the acetaminophen group on the third postoperative day as compared with the pretreatment platelet aggregation results ( P < . 05 ) .
 Disease: platelet aggregation; Chemical: acetaminophen; Disease: platelet aggregation
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: platelet aggregation; Chemical: acetaminophen; Disease: platelet aggregation