1Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Box 3918, Durham, NC 27710, USA
2Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
3Mental Illness Research Education and Clinical Center for Post Deployment Mental Health, Durham VA Medical Center, Durham, NC, USA
4Departments of Psychiatry and Neuroscience, University of Alberta, Edmonton, AB, Canada
5Department of Neuroscience, Emory University, Atlanta, GA, USA
6Center for Cognitive Neuroscience, Duke University, Duke University, Durham, NC, USA
7Department of Psychology, Yale University, New Haven, CT USA