1. From Department of Psychiatry (D.J.M., R.G.R., S.M.H., S.A., J.S.P.), University of Iowa Carver College of Medicine, Iowa City, Iowa; Department of Psychology (R.L.R.), Washington University, St. Louis, Mo; Department of Internal Medicine (W.G.H.), General Clinical Research Center, University of Iowa Carver College of Medicine, Iowa City, Iowa.