Psychostimulants / George F. Koob, PhD, National Institute on Alcoholism and National Institute on Drug Abuse at the National Institutes of Health, Bethesda, MD, USA, Michael A. Arends, Department of Neuroscience, The Scripps Research Institute, La Jolla, CA, USA, Department of Psychiatry, University of California, San DIego, La Jolla, Ca, USA, Mandy L. McCracken, National Institute on Drug Abuse, National Institutes of Health, Bethesda, MD, USA, Michel Le Moal, University of Bordeaux, Neurocentre Magendie, Inserm, Bordeaux, France.