1. Division of Neurosurgery, Faculty of Medicine, Jordan University of Science & Technology, Irbid, Jordan;
2. Department of Anatomy, College of Medicine & Health Sciences, United Arab Emirates University, Al Ain, UAE;
3. Department of Anatomy, Faculty of Medicine, Jordan University of Science & Technology, Irbid, Jordan;
4. Division of Spine Surgery, Department of Special Surgery, Faculty of Medicine, Jordan University of Science & Technology, Irbid, Jordan;
5. Faculty of Medicine, Jordan University of Science & Technology, Irbid, Jordan;
6. Division of Haematology, Department of Internal Medicine, Faculty of Medicine, Jordan University of Science & Technology, Irbid, Jordan