13263
OBJECTIVES : The purpose of the current study is to analyze whether abstinence from repeated amphetamine treatment in rats induces depressive - like behaviors and if oxidative damage in the brain continues during abstinence .
 Chemical: amphetamine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: amphetamine