1. Clinical Trials Directorate, Armauer Hansen Research Institute , Addis Ababa , Ethiopia
2. Clinical, Assessment, Regulatory, Evaluation (CARE) Unit, International Vaccine Institute , Seoul , Republic of Korea
3. School of Public Health, Hawassa University , Hawassa , Ethiopia
4. Bacterial and Viral Disease Research Directorate, Armauer Hansen Research Institute , Addis Ababa , Ethiopia
5. College of Medicine and Health Sciences, Hawassa University , Hawassa , Ethiopia
6. Statistics and Data Management Department, Armauer Hansen Research Institute , Addis Ababa , Ethiopia
7. Biostatistics and Data Management (BDM) Department, International Vaccine Institute , Seoul , Republic of Korea
8. Public Health Emergency Management, Ethiopia Public Health Institute , Addis Ababa , Ethiopia
9. Department of Global Health and Disease Control, Yonsei University Graduate School of Public Health , Seoul , Republic of Korea