1. From the Department of Vascular Medicine (A.S., V.E.A.G., H.R.B.), Academical Medical Center, Amsterdam, The Netherlands; the Department of Internal Medicine (V.E.A.G., D.P.M.B.), Slotervaart Hospital, Amsterdam, The Netherlands; the Department of Neurology (J.S.), Academical Medical Center, Amsterdam, The Netherlands; and the Department of Internal Medicine (A.S.), University of Insubria, Varese, Italy.