1. From the Department of Neurosciences and Mental Health (Neurology), Hospital Santa Maria/CHULN, Lisbon, Portugal (D.A.d.S., P.C., J.M.F.)
2. Instituto de Medicina Molecular, Lisbon (D.A.d.S., P.C., J.M.F.)
3. Institute of Anatomy, Faculdade de Medicina, Universidade de Lisboa (D.A.d.S., L.L.N., S.P.)
4. Department of Neuroradiology (L.L.N.), Hospital Santa Maria/CHULN, Lisbon, Portugal
5. Department of Neurology (S.J., L.P., M.R.H., U.F., M.A.), Inselspital University Hospital, Bern, Switzerland.
6. University Institute of Diagnostic and Interventional Neuroradiology (M.E-.K., A.H.), Inselspital University Hospital, Bern, Switzerland.