1. From the Seaman Family MR Research Centre (A.L.K., S.B.C., J.E.S., C.-H.S., A.M.D.), Foothills Medical Centre, Calgary Health Region, Calgary, Alberta, Canada; the Departments of Clinical Neurosciences (S.B.C., J.E.S., M.D.H., A.M.D.), Community Health Sciences (M.D.H.), Medicine (M.D.H.), and Radiology (C.-H.S.), University of Calgary, Calgary, Alberta, Canada; and the Department of Radiology (C.-H.S.), Keimyung University, South Korea.