1. Department of Psychiatry (Jester, Kohn, Tibiriçá, Jeste), Sam and Rose Stein Institute for Research on Aging (Jester, Kohn, Tibiriçá), and Department of Radiation Medicine and Applied Sciences (Murphy), University of California, San Diego, La Jolla; Department of Psychology, Colorado State University, Fort Collins (Thomas); Division of Health Management and Policy, School of Public Health, San Diego State University, San Diego (Brown).