1. From the Department of Preventive Medicine (M.R.C.), The Feinberg School of Medicine, Northwestern University, Chicago, Ill; Department of Medicine (S.H.G.), Division of Endocrinology, The Johns Hopkins University, Baltimore, Md; Department of Epidemiology (A.R.F.), University of Minnesota, Minneapolis, Minn; Stanford Center for Research in Disease Prevention (W.H.), Stanford University School of Medicine, Stanford University, Palo Alto, Calif; and Department of Health Evaluation Sciences (D.L.),...