1North Little Rock VA Medical Center (TAKi), North Little Rock, Arkansas, USA
2Biological Psychiatry Branch (TAKi, TAKe, MSG, JTL, BEB, MWW, RMP), National Institute of Mental Health, Bethesda, Maryland, USA
3Stanford University School of Medicine (TAKe), Stanford, California, USA
4Medical University of South Carolina (MSG), Charleston, South Carolina, USA
5Division of Psychiatric Neuroimaging (JTL), Johns Hopkins School of Medicine, Baltimore, Maryland, USA
6Positron Emission Tomography Section (PH), Department of Nuclear Medicine, National Institutes of Health Clinical Center, Bethesda, Maryland, USA