1. Department of Medicine, Faculty of Medicine and Health Sciences, An-Najah National University , Nablus, Palestine
2. Department of Internal Medicine, An-Najah National University Hospital , Nablus, Palestine
3. Emergency Department, Rafidia Government Surgical Hospital , Nablus, Palestine
4. Anesthesia Department, Specialized Arab Hospital , Nablus, Palestine
5. Department of Surgery, Rafidia Government Surgical Hospital , Nablus, Palestine