4535
No statistically significant differences were observed between the two isoproterenol treated groups for severity of the induced lesions , changes in heart weight , or heart weight to body weight ratios .
 Chemical: isoproterenol
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: isoproterenol