1 From the Group Health Research Institute and the Departments of Medicine and Health Services, University of Washington - both in Seattle (E.B.L.); the Departments of Psychiatry, Neurology, and Epidemiology and Biostatistics, University of California, San Francisco, and the San Francisco Veterans Affairs (VA) Medical Center - both in San Francisco (K.Y.); and the Division of General Medicine, VA Ann Arbor Center for Clinical Management Research, and the Institute for Social Research, Institute of Gerontology, and Institute for Healthcare Policy and Innovation, University of Michigan - all in Ann Arbor (K.M.L.).