1. HIV and TB Research Directorate, Ethiopian Public Health Institute (EPHI), Addis Ababa, Ethiopia
2. Institute of Biomedical Science, College of Health Sciences, Mekelle University, Mekele, Ethiopia
3. Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
4. Department of Medical Laboratory Sciences, Addis Ababa University, Addis Ababa, Ethiopia