Chamberlain Samuel R, Menzies Lara, Sahakian Barbara J, Fineberg Naomi A
Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke's Hospital, Box 189, Cambridge, CB2 2QQ UK.
Am J Psychiatry. 2007 Apr;164(4):568-74. doi: 10.1176/ajp.2007.164.4.568.