1. Department of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville (Huang, Sheffield, Blackford, Heckers, Woodward); Vanderbilt University Institute of Imaging Sciences, Nashville (Rogers); Department of Psychiatry, University of Pittsburgh, Pittsburgh (Jalbrzikowski); Department of Psychiatry, Yale University School of Medicine, New Haven, Conn. (Anticevic); Research and Development, Department of Veterans Affairs Medical Center, Nashville (Blackford).