1. Preventive Medicine Division, Department of Medicine, Hamad Medical Corporation
2. Department of Community and Preventive Medicine, Primary Health Care Corporation
3. Department of Community and Preventive Medicine, Hamad Medical Corporation
4. Department of Medicine, Hamad Medical Corporation
5. College of Medicine, QU Health, Qatar University, Doha, Qatar
6. Department of Community Medicine, Sousse University, Sousse, Tunisia
7. Department of Public Health and Preventive Medicine, Cairo University, Cairo, Egypt