1. Unit of Immunology, Department of Medical Laboratory Science, Debre Tabor University, Debre Tabor, Ethiopia
2. Department of Medical Laboratory Science, Debre Tabor University, Debre Tabor, Ethiopia
3. Department of Nursing, Injibara University, Injibara, Ethiopia
4. Unit of Medical Microbiology, Department of Medical Laboratory Science, Debre Tabor University, Debre Tabor, Ethiopia