1. Public Health Directorate Ministry of Health Riyadh Kingdom of Saudi Arabia
2. Division of Pulmonary Disease and Critical Care Medicine Department of Medicine Winthrop University Hospital Mineola New York USA
3. Makkah regional Health Directorate Ministry of Health Makkah Kingdom of Saudi Arabia
4. Infectious Diseases Division Department of Medicine & Department of Research Prince Mohamed Bin Abdulaziz Hospital Ministry of Health College of Medicine Alfaisal University Riyadh Kingdom of Saudi Arabia
5. Hubert Department of Global Health Rollins School of Public Health Emory University Atlanta Georgia USA