1. Department of Vascular Surgery, University Medical Center Utrecht, the Netherlands (S.J.A.D., R.J.T., G.J.d.B.).
2. Department of General Surgery, Jeroen Bosch Hospital, Den Bosch, the Netherlands (M.L.R.).
3. Department of Radiology and Nuclear Medicine, Erasmus Medical Centre, Rotterdam, the Netherlands (A.v.d.L.).
4. Department of Neurology and Stroke Center, University Hospital Basel, Switzerland (L.H.B.).