1. Department of Internal Medicine, Hamad Medical Corporation (HMC), Doha, Qatar
2. Department of Internal Medicine, King Hussain Cancer Center (KHCC), Doha, Qatar
3. Department of Special Surgery, School of Medicine, University of Jordan, Amman, Jordan
4. Department of General Surgery, School of Medicine, University of Jordan, Amman, Jordan
5. Department of Pathology, Microbiology and Forensic Medicine, School of Medicine, University of Jordan, Amman, Jordan