Cedars Sinai Medical Center - Department of Neurosurgery, Cedars Sinai Medical Center - Department of Neurosurgery, Cedars Sinai Medical Center - Department of Neurology, Cedars Sinai Medical Center - Department of Neurology, Cedars Sinai Medical Center - Department of Neurology, Cedars Sinai Medical Center - Department of Neurology, Cedars Sinai Medical Center - Department of Neurosurgery, Cedars Sinai Medical Center - Department of Neurosurgery, University of California, Los Angeles (UCLA) - Neurovascular Imaging Research Core and Stroke Center, University of California, Los Angeles (UCLA) - Department of Neurology, University of California, Los Angeles (UCLA) - Department of Neurology, University of California, Los Angeles (UCLA) - Department of Neurology, Cedars Sinai Medical Center - Department of Neurosurgery, Cedars Sinai Medical Center - Department of Neurosurgery, Cedars Sinai Medical Center - Department of Medicine and University of California, Los Angeles (UCLA) - Department of Neurology

Johns Hopkins University, Johns Hopkins University - Department of Radiology, Louisiana State University, Baton Rouge, Louisiana State University, Baton Rouge, Thomas Jefferson University, University of Massachusetts Worcester - Department of Neurology, Rutgers, The State University of New Jersey - New Jersey Medical School, University of Massachusetts Memorial Medical Center, Rowan University - Cooper Medical School, Mayo Clinic, Henri-Mondor/Albert-Chenevier Hospital, National University of Singapore (NUS) - National University Hospital, Stanford University - Stanford University Medical Center, Harvard University - Harvard Medical School, University of Toronto - Saint Michael's Hospital, Harvard University - Brigham and Women's Hospital, University Hospital of Limoges, University of Hamburg - University Medical Center Hamburg-Eppendorf, McGovern Medical School - Department of Neurology, Yeshiva University - Montefiore Medical Center, University of Massachusetts Worcester - UMass Chan Medical School, Lübeck GmbH, Oregon Health and Science University, Bordeaux University Hospital - CHU Bordeaux, University of Florence - Azienda Ospedaliero Universitaria Careggi, Universidade do Porto - Centro Hospitalar Universitário do Porto, University of Cincinnati - University of Cincinnati Medical Center, University of Montpellier - Gui-de-Chauliac Hospital, University of Toronto - Saint Michael's Hospital, University of Toronto - Saint Michael's Hospital, Tokyo Metropolitan Tama Medical Center, University of Southern California - Keck School of Medicine, Thomas Jefferson University, New York Medical College - Westchester Medical Center, Sorbonne University - Interventional Neuroradiology Unit, University of Chicago - Medical Center, Boston University - Department of Neurology, Universidade do Porto - Centro Hospitalar Universitário do Porto, Yeshiva University - Montefiore Medical Center, Yeshiva University - Montefiore Medical Center, Cedars Sinai Medical Center - Department of Neurosurgery, Heidelberg University - University Hospital Heidelberg, University of Montpellier - Gui-de-Chauliac Hospital, University of Lorraine - INSERM U1254, University Hospital Münster, Harvard University - Brigham and Women's Hospital, Paracelsus Medical University Salzburg, Rowan University - Cooper Medical School, University of California, Los Angeles (UCLA) - Department of Neurology and Comprehensive Stroke Center, Fondazione Policlinico Universitario A. Gemelli IRCCS, Fondazione Policlinico Universitario A. Gemelli IRCCS, Civil Hospital Marie Curie, University of Amsterdam - University Medical Center, Hôpitaux de Paris (AP-HP) - Hôpital Henri Mondor, Université Libre de Bruxelles (ULB) - Erasme University Hospital, Harvard University - Massachusetts General Hospital, University of Toronto - Saint Michael's Hospital, Université Libre de Bruxelles (ULB) - Erasme University Hospital and Harvard University - Massachusetts General Hospital