1. University of Gondar, College of medicine and Health sciences, School of Nursing
2. Addis Ababa University, College of Nursing and Midwifery
3. University of Gondar, Institute of Public Health, Associate professor of Biostatistics
4. Karolinska Institute, Solna and Sophia Emmet University
5. Karolinska Institute, Karolinska Institute, Dalarna University