1. Department of Neurosurgery, Kentucky Neuroscience Institute, University of Kentucky, College of Medicine, Lexington, Kentucky, United States
2. Department of Neurosurgery, Geisinger Commonwealth School of Medicine, Danville, PA, United States
3. Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, United States,
4. Department of Neurosurgery, Dr. Sa’ad AL-Witri Hospital for Neurosciences, Baghdad, Iraq,
5. Department of Surgery, Division of Neurosurgery, State University of New York Downstate Health Sciences University, New York, United States.