1. Haematology and Blood Transfusion Science Unit, Department of Medical Laboratory Sciences, College of Health Sciences, Niger Delta University, Wilberforce Island, Nigeria
2. Department of Haematology and Blood Transfusion, University of Maiduguri Teaching Hospital, Maiduguri, Nigeria
3. Department of Immunology, University of Maiduguri Teaching Hospital, Maiduguri, Nigeria
4. Department of Medical Laboratory Science, College of Medical Sciences, University of Maiduguri, Maiduguri, Nigeria