1. Department of Pharmacology and Therapeutics, Faculty of Pharmaceutical Science Ahmadu Bello University, Zaria, Nigeria.
2. Department of Medical Microbiology, Ahmadu Bello University Teaching Hospital, Zaria, Nigeria.
3. Department of Medical Laboratory Science, Faculty of Applied Health Science Edo State University, Uzairue, Edo State, Nigeria.
4. Immunology Unit, Department of Medicine, Ahmadu Bello University, Zaria, Nigeria.
5. Department of Haematology, Faculty of Clinical Sciences, Bayero University/Department of Haematology and Blood Transfusion, Aminu Kano Teaching Hospital, Kano, Nigeria.
6. DC&ONID, Department of Biochemistry, Faculty of Basic and Applied Sciences, Osun State University, Osogbo, Nigeria.