1. Department of Public Health Surveillance Ethiopian Public Health Institute Tigray Branch Mekelle Ethiopia
2. Department of Biostatistics, School of Public Health, College of Health Science Mekelle University Mekelle Ethiopia
3. Department of Reproductive Health, School of Public Health, College of Health Science Mekelle University Mekelle Ethiopia
4. Department of Public Health, College of Medicine and Health Sciences Adigrat University Adigrat Ethiopia
5. Department of Biomedical Sciences, College of Medicine and Health Sciences Adigrat University Adigrat Ethiopia
6. Department of Surgery, School of Medicine, College of Health Science Mekelle University Mekelle Ethiopia
7. Department of Clinical governance and Quality Improvement, Ayder Comprehensive Specialized Hospital Mekelle University Mekelle Ethiopia