1. 1. Department of Medical Laboratory, St. Peter’s Specialized Hospital, Addis Ababa
2. 2. National HIV Reference Laboratory, Ethiopian Public Health Institute, Addis Ababa
3. 3. National Clinical Chemistry Laboratory, Ethiopian Public Health Institute, Addis Ababa
4. 4. Department of Medical Laboratory Science, College of Health Science, Addis Ababa University, Addis Ababa