1. From the Departments of Neurology (C.E.K., H.O., N.L., L.T., U.W.-A., H.N.) and Radiology (G.M.), Haukeland University Hospital, Bergen, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway (C.E.K., L.T.); and Centre of Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway (H.N.).