22375
Abstinent former users , however , did show a reduced modulation , relative to controls , of their ERPs to valenced input while performing successful inhibitions , although contrary to our hypothesis , the use of valenced inputs had no impact on inhibitory performance .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None