1. Stroke Unit, Emergency Department (M.D.M., I.B., O.G.S., D.T.), Sapienza University of Rome, Italy.
2. Clinical and Translational Neuroscience Unit, Department of Neurology, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY (J.K., A.E.M.).
3. Neuroradiology Unit, Department of Human Neurosciences (M.I.), Sapienza University of Rome, Italy.