1. Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia (S.E.K.).
2. Department of Experimental and Clinical Medicine, Marche Polytechnic University, Ancona, Italy (S.L.).
3. Department of Neurology, Centro Hospitalar Universitário Lisboa Norte, Faculdade de Medicina, Universidade de Lisboa, Portugal (A.C.F.).
4. Division of Cardiovascular Medicine, University of California San Francisco (A.Y.E.).
5. Division of Cardiovascular Medicine, Harrington Heart and Vascular Institute, Case Western Reserve University, Cleveland, OH (A.Y.E.).