1. Department of Radiology, Neuroradiology Division, Weill Cornell Medical College, New York–Presbyterian Hospital, New York, NY.
2. Department of Radiology, Neuroradiology Division, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Lenox Hill Hospital, 100 E 77th St, 3rd Fl, New York, NY 10075.
3. Department of Neurology, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX.
4. Department of Radiology, Neuroradiology Division, Stanford University School of Medicine, Stanford, CA.
5. Mallinckrodt Institute of Radiology, Neuroradiology Division, Washington University School of Medicine in St. Louis, St. Louis, MO.