1. Department of Neurology and Stroke Unit, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy (G.S., A.C.R., G.G., E.C.A.).
2. Stroke Research Centre, University College London, Institute of Neurology, UK (G.S.).
3. Department of Neurology, Karolinska University Hospital, Stockholm, Sweden (M.M., N.A.).
4. Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden (M.M., N.A.).
5. Department of Neurology - Stroke Unit, Ospedale San Giuseppe MultiMedica IRCCS, Milano, Italy (G.G.).
6. Neuroradiology and Neurology Units, Istituto Ospedaliero Fondazione Poliambulanza, Brescia, Italy (P.I.).
7. S.S. Neurovascolare, ASL Città di Torino, Ospedale Maria Vittoria, Italia (F.M.).
8. Department of Neurology, P.J. Safarik University, Kosice, Slovakia (N.L.).
9. Emergency Department Stroke Unit, Department of Human Neurosciences, Sapienza University of Rome, Italy (D.T.).