1. Department of Neurology (M.H.F.P.), University Medical Center Utrecht, the Netherlands.
2. Julius Center for Health Sciences and Primary Care (R.A.R.H., J.A.A.D., J.P.G.), University Medical Center Utrecht, the Netherlands.
3. Division of Vascular and Endovascular Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (K.D., M.L.S.).
4. Department of Vascular Surgery (G.J.d.B), University Medical Center Utrecht, the Netherlands.