1. Jordan University of Science & Technology, Faculty of Medicine, Internal Medicine Department, 3030, Ar-Ramtha, Jordan
2. King Hussein Cancer Center, Palliative Medicine Department, Queen Rania St 202, Amman, Jordan
3. Jordan University of Science & Technology, Faculty of Science, Mathematics Department, 3030, Ar-Ramtha, Jordan
4. Jordan University of Science & Technology, Faculty of Medicine, Internal Medicine Department, Pulmonary & Critical Care Division, 3030, Ar-Ramtha, Jordan