1. Departments of Pediatrics and Child Health School of Medicine College of Medicine and Health Sciences University of Gondar Gondar Ethiopia
2. Departments of Gynecology and Obstetrics School of Medicine College of Medicine and Health Sciences University of Gondar Gondar Ethiopia
3. Department of Health Informatics Institute of Public Health College of Medicine and Health Sciences University of Gondar Gondar Ethiopia
4. Department of Environmental and Occupational Health, and Safety Institute of Public Health College of Medicine and Health Sciences University of Gondar Gondar Ethiopia