(1) Department of Clinical Medicine, University of Insubria, Varese, Italy; (2) Department of Hematology, Cambridge University, Cambridge, UK; (3) Department of Medicine, McMaster University, Hamilton, Canada; (4) Stanford Stroke Center, Stanford University Medical Center, Palo Alto, USA; (5) Department of Vascular Medicine and Stroke Unit, University of Perugia, Perugia, Italy; (6) Department of Angiology, University of Bologna, Bologna, Italy