1. Department of Internal Medicine, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
2. Department of Public Health, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
3. Ministry of Health, Amman, Jordan
4. Department of Internal Medicine, Faculty of Medicine, University of Jordan, Amman, Jordan
5. Department of Internal Medicine, Istishari Hospital, Amman, Jordan
6. Department of Cardiology, Istishari Hospital, Amman, Jordan