[1] Debre Birhan University,Department of Nursing, College of Medicine and Health Sciences
[2] University of Gondar,Department of Health Service Management, Institute of Public Health, College of Medicine and Health Sciences
[3] Addis Ababa Science and Technology University,Department of Public Health, School of Medicine and Health Sciences
[4] University of Gondar,Department of Epidemiology and Biostatistics, Institute of Public Health, College of Medicine and Health Sciences