2160
There is a < 2 dB difference in mean threshold for patients treated with DFMO plus sulindac compared with those treated with placebo .
 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