1. From the Department of Radiology, AA Martinos Center for Biomedical Imaging (H.A., E.M.A., T.B.), Stroke Service, Department of Neurology (H.A., J.R.), and Center for Human Genetic Research (J.R.), Massachusetts General Hospital, Harvard Medical School, Boston; Department of Neurology and Rehabilitation Medicine, Skåne University Hospital, Lund, Sweden (G.A., H.D., A.L., O.M., B.N.); Department of Neurology, Mayo Clinic Rochester, MN (R.D.B.); Department of Neurology (S.N.C., B.B.W.), Center for...