2153
Based on 290 subjects , there was an average difference of 0 . 50 dB between subjects treated with DFMO plus sulindac compared with those treated with placebo ( 95 % confidence interval , - 0 . 64 to 1 . 63 dB ; P = 0 . 39 ) , adjusted for baseline values , age , and frequencies .
 Chemical: DFMO; Chemical: sulindac
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: DFMO; Chemical: sulindac