1 Department of Psychology, University of Georgia, Athens, Georgia.
2 Department of Psychiatry, UT Southwestern Medical School, Dallas, Texas.
3 Department of Psychiatry, Harvard Medical School, Beth Israel Deaconess Medical Center and Massachusetts Mental Health Center, Boston, Massachusetts.
4 Department of Psychiatry and Olin Neuropsychiatry Research Center, Yale University Medical School, Hartford, Connecticut.
5 Department of Psychiatry, UT Southwestern Medical School, Dallas, Texas. Electronic address: Carol.tamminga@UTSouthwestern.edu.