1. From the Brown University (S.F.B.), Providence, RI; Family Medicine (S.F.B.), Mountain Area Health Education Center, Asheville, NC; Department of Epidemiology (J.M.C., K.M.A., S.-A.M.L., J.D.S., R.G., E.A.W.), Gillings School of Global Public Health, and Department of Neurology (D.Y.H.), School of Medicine, University of North Carolina, Chapel Hill; Department of Medicine (J.E.M.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Division of Public Health Sciences (A.P.R.), Fred...