1. Department of Community and Family Medicine, College of Medicine, University of Baghdad, Baghdad 10047, Iraq
2. Surveillance Section, Communicable Diseases Control Center, Directorate of Public Health, Ministry of Health, Baghdad 10047, Iraq
3. Head of the Surveillance Section, Communicable Diseases Control Center, Directorate of Public Health, Ministry of Health, Baghdad 10047, Iraq
4. Head of Communicable Diseases Control Center, Directorate of Public Health, Ministry of Health, Baghdad 10047, Iraq
5. Al-Karkh Health Directorate, Public Health Department, Ministry of Health, Baghdad 10047, Iraq
6. Professor of Epidemiology, Medical Education and Biostatistics, Department of Community Medicine, Public Health and Family Medicine/Faculty of Medicine, Jordan University of Science & Technology, Irbid 22110, Jordan
7. Directorate of Public Health, Ministry of Health, Baghdad 10047, Iraq