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Further , methylphenidate did not alter DAT cellular localization , indicating that methylphenidate treatment during adolescence regulated DAT function in SHR mPFC in a trafficking - independent manner .
 methylphenidate, methylphenidate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 methylphenidate, methylphenidate