1349
We aimed to compare the risks of hospitalization for AMI and GI bleeding among elderly patients using COX - 2 inhibitors , NS - NSAIDs and acetaminophen .
 Disease: AMI; Disease: GI bleeding; Chemical: COX - 2 inhibitors; Chemical: acetaminophen
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: AMI; Disease: GI bleeding; Chemical: COX - 2 inhibitors; Chemical: acetaminophen