1. Third Faculty of Medicine, Cardiocenter, Charles University, University Hospital Kralovske Vinohrady, Srobárova 50, 100 00 Prague, Czech Republic
2. Center for Stroke Research Berlin and Department of Cardiology, Campus Virchow, Charité—Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
3. Berlin-Brandenburg Center for Regenerative Therapies, Charite Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
4. Department of Neurology, University Hospital Essen, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany
5. University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
6. Nuffield Department of Surgical Sciences, John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, UK
7. Stroke Unit Lariboisière Hospital, Interventional Neuroradiology Fondation Rothschild, Denis Diderot University, 2 rue Ambroise Paré, Paris 75010, France