RT Journal Article SR Electronic T1 The Neuroscience of Natural Rewards: Relevance to Addictive Drugs JF The Journal of Neuroscience JO J. Neurosci. FD Society for Neuroscience SP 3306 OP 3311 DO 10.1523/JNEUROSCI.22-09-03306.2002 VO 22 IS 9 A1 Ann E. Kelley A1 Kent C. Berridge YR 2002 UL http://www.jneurosci.org/content/22/9/3306.abstract AB