2494
In contrast , SSR103800 failed to affect hyperactivity induced by amphetamine or naturally observed in dopamine transporter ( DAT ( - / - ) ) knockout mice ( 10 - 30 mg / kg p . o . ) .
 SSR103800, hyperactivity, amphetamine, dopamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 SSR103800, hyperactivity, amphetamine, dopamine