1223
We briefly describe two patients suffering from recent - onset atrial fibrillation , who experienced an acute devastating low back pain a few minutes after initiation of intravenous amiodarone loading .
 Disease: atrial fibrillation; Disease: low back pain; 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:
 Disease: atrial fibrillation; Disease: low back pain; Chemical: amiodarone