1. Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston2Department of Neuroradiology, Université Paris-Descartes, INSERM U894, Centre Hospitalier Sainte-Anne, Paris, France
2. Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston3Department of Neuroradiology, Goethe University, Frankfurt, Germany
3. Stroke Service, Massachusetts General Hospital, Harvard Medical School, Boston
4. Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston
5. Stroke Service, Massachusetts General Hospital, Harvard Medical School, Boston5Neuroendovascular Program, Massachusetts General Hospital, Harvard Medical School, Boston
6. Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston4Stroke Service, Massachusetts General Hospital, Harvard Medical School, Boston