1. From the Department of Radiology (A.J.B.L., G.L., F.B.), Department of Neurology (E.C.W. van S., P.S.), Image Analysis Center (E.C.W. van S., F.B.), and Alzheimer Center (P.S.), Vrije Universiteit Medical Center, Amsterdam, Netherlands; and Department of Neuroradiology, Hospital Geral de Santo António, Oporto, Portugal (A.J.B.L.).