1. Department of Angiology and Vascular Surgery, Centro Hospitalar Vila Nova de Gaia/Espinho, Portugal (A.C.).
2. Faculdade Medicina da Universidade do Porto, Portugal (A.C., A.M.).
3. Department of Vascular Surgery, Siriraj Hospital, Bangkok, Thailand (T.P.).
4. Department of Neurology (J.K.), University Medical Center Utrecht, the Netherlands.
5. Department of Vascular Surgery, Leicester, United Kingdom (R.N.).
6. Department of Vascular Surgery (G.J.d.B.), University Medical Center Utrecht, the Netherlands.