544
RESULTS : amiodarone use was associated with an increased risk of pacemaker insertion ( OR : 2 . 14 , 95 % confidence interval [ CI ] : 1 . 30 to 3 . 54 ) .
 Chemical: amiodarone
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: amiodarone