1. Department of Neurology, University of Tennessee Health Science Center, Memphis, TN
2. Second Department of Neurology, “Attikon University Hospital,”, School of Medicine, National and Kapodistrian University of Athens, Greece
3. Department of Neurology, West Virginia University Charleston Division, Charleston, WV
4. Department of Neurosurgery, University of Tennessee Health Science Center, Semmes‐Murphey Neurologic and Spine Clinic, Memphis, TN
5. Medstar Washington Hospital Medical Center, Washington, DC