1757
Myocardial accumulation of [ 125I ] MIBG 4 hr after intravenous injection did not differ between the controls and the groups treated 3 wk or less .
 Chemical: MIBG
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: MIBG