1. Facharzt Internal Medicine, Facharzt Nephrology, Medical Department, Hamad General Hospital, Doha, Qatar
2. Medical Department, Hamad General Hospital, Doha, Qatar
3. Facharzt Internal Medicine, Medical Department, Alwakra General Hospital, Alwakra, Qatar
4. Medical Education Fellow, Lincoln Medical School, University of Lincoln, Lincoln, UK
5. Hematology-Oncology Department, Tripoli Children Hospital, Tripoli, Libya
6. Facharzt Pediatric, Facharzt Hemotoncology, Hematology-Oncology Department, Tripoli Children Hospital, Tripoli, Libya
7. Medical Department, Tripoli Central Hospital, University of Tripoli, Tripoli, Libya
8. al-Arqam Academy, Doha, Qatar
9. Quality Department, Senior Epidemiologist, Hamad Medical Corporation, Doha, Qatar
10. Hamad General Hospital, Doha, Qatar.