1. Hawasa University Comprehensive Teaching Referral Hospitals, Hawasa, Ethiopia
2. Department of Epidemiology, School of Public Health, Institute of Health, Bule Hora University, Bule Hora, Ethiopia
3. Departments Public Health, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
4. Department of Public Health, Institute of Health Sciences, Wallaga University, Nekemte, Ethiopia
5. Deakin Health Economics, School of Health and Social Development, Institute for Health Transformation, Deakin University, Geelong, Australia