3953
This study ' s objective was to test whether alpha 7 nAChR positive allosteric modulators ( PAMs ) produce antinociception in in vivo mouse models of acute and persistent pain .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None