From the Institute of Cardiovascular Research Royal Holloway (G.K.-D., P.S.), University of London (ICR2UL), United Kingdom; Fondazione IRCCS Ca'Granda-Ospedale Maggiore Policlinico (I.M., S.M.P., M.A., P.B., E.P.), A. Bianchi Bonomi Hemophilia and Thrombosis Center, Milan, Italy; Moncucco Hospital Group (I.M., E.G.), Lugano, Switzerland; Atherosclerosis and Thrombosis Unit (E.G., G.F., D.C.), I.R.C.C.S. Fondazione "Casa Sollievo della Sofferenza", S. Giovanni Rotondo; Medical and Surgical Department (E.G.), University of Foggia, Italy; Department of Obstetrics (E.G.), Gynaecology and Perinatal Medicine, First Sechenov University, Moscow, Russia; Neurology (S.H., J.P., E.H., T.T.), Helsinki University Hospital and University of Helsinki, Finland; Department of Clinical Neuroscience (E.L., K.J., T.T.), Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg; Department of Neurology (E.L., K.J., T.T.), Sahlgrenska University Hospital, Gothenburg, Sweden; Medical Genetics (M. Margaglione, R.S.), Department of Clinical and Experimental Medicine, University of Foggia, Italy; Normandy University (V.L.C.D.), UNIROUEN, INSERM U1096, Rouen University Hospital, Vascular Hemostasis Unit and INSERM CIC-CRB 1404; Department of Neurology (A.B.T.), Rouen University Hospital, France; Neurology Unit (M.Z.), Stroke Unit, Azienda Unità Sanitaria Locale-IRCCS of Reggio Emilia; Department of Clinical and Experimental Medicine (M. Mancuso), Neurological Institute, University of Pisa, Italy; UMC Utrecht Brain Center (Y.M.R.), Department of Neurology and Neurosurgery, University Medical Center Utrecht, the Netherlands; Department of Neurology (B.B.W.), University of Virginia, Charlottesville, VA; Department of Neurology (J.J.M., A.T.), University of Utah, Salt Lake City; Department of Neurology (S.Z., M.C.B., J.M.C.), Amsterdam University Medical Centers, location AMC, Amsterdam Neuroscience, University of Amsterdam, the Netherlands; Department of Neurosciences (R.L.), Experimental Neurology, KU Leuven-University of Leuven; VIB Center for Brain & Disease Research; Department of Neurology, University Hospitals Leuven, Belgium; Department of Pathophysiology and Transplantation (E.P.), Università degli Studi di Milano, Milan; Department of Clinical and Experimental Sciences (P. Costa), Neurology Clinic; Division of Biology and Genetics (M.C.), Department of Molecular and Translational Medicine, University of Brescia, Italy; Stroke Center (D.A.D.S.), Centro Hospitalar Universitário Lisboa Central; CEEM and Institute of Anatomy (D.A.D.S.), Faculdade de Medicina; Instituto de Medicina Molecular João Lobo Antunes (D.A.D.S., J.M.F.), Universidade de Lisboa; Department of Neurosciences (S.G.R., P. Canhao), Hospital of Santa Maria, University of Lisbon, Portugal; Stroke Clinic (A.A.), National Institute of Neurology and Neurosurgery Manuel Velasco Suarez, Mexico City; Department of Neurology (K.S.), University of Athens School of Medicine, Eginition Hospital, Athens, Greece; McMaster University (A.H., R.D., G.P.), Pathology and Molecular Medicine, Population Health Research Institute and Thrombosis and Atherosclerosis Research Institute, Hamilton Health Sciences, Hamilton, Ontario, Canada; Department of Medicine and Surgery (A.P.), University of Parma, Stroke Care Program, Department of Emergency, Parma University Hospital, Italy; Stroke Division (V.N.T.), Florey Institute of Neuroscience and Mental Health, University of Melbourne, Heidelberg, Victoria, Australia; and Department of Clinical Neuroscience (P.S.), Imperial College Healthcare NHS Trust, London, United Kingdom.