1. Department of Surgery, Faculty of Medicine, The Hashemite University, Zarqa 13133, Jordan
2. Department of Special Surgery, Faculty of Medicine, Jordan University of Science & Technology, Irbid, 22110, Jordan
3. Department of Internal Medicine, Faculty of Medicine, Jordan University of Science & Technology, Irbid, 22110, Jordan
4. Department of Public Health & Family Medicine, Faculty of Medicine, Jordan University of Science & Technology, Irbid, 22110, Jordan
5. Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA