[1] Univ Cambridge, Dept Psychol, Cambridge CB2 3EB, England
[2] NIMH, Neuropsychol Lab, Bethesda, MD 20892 USA
[3] Ctr Addict & Mental Hlth, Res Imaging Ctr, Toronto, ON M5T 1R8, Canada
[4] Radboud Univ Nijmegen, Donders Inst Brain Cognit & Behav, NL-6525 HP Nijmegen, Netherlands
[5] Univ British Columbia, Dept Psychol, Vancouver, BC V6T 1Z4, Canada
[6] Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China
[7] Beijing Normal Univ, IDG McGovern Inst Brain Res, Beijing 100875, Peoples R China