1. From Riks-Stroke (K.A., F.J., M.E.), Department of Medicine, University Hospital, Umeå, Sweden; Epidemiologic Center (B.S.), National Board of Health and Welfare, Stockholm, Sweden; Department of Neurology (P.A.), University Hospital. Örebro, Sweden; Department of Neurology (B.N.), University Hospital, Lund, Sweden; Department of Medicine (A.T.), Akademiska University Hospital, Uppsala, Sweden; Department of Medicine (K.H.Å.), Enköping Hospital, Enköping, Sweden.