[1] The Ohio State University Medical Center,Departments of Radiology and Neurology, College of Medicine
[2] The University Hospitals of Cleveland and Case Western Reserve University,Cerebrovascular Center and Neurosciences Critical Care, Departments of Neurology and Radiology
[3] State University of New York,Department of Neurosurgery, School of Medicine and Biomedical Sciences
[4] St. Mary’s Hospital,Department of Radiology
[5] Hygeia Hospital,Department of Radiology
[6] Baylor College of Medicine,Department of Neurology
[7] Medical College of Wisconsin,Departments of Neurology and Neurosurgery
[8] University of Minnesota,Departments of Neurology, Neurosurgery and Radiology