1. Department of Haematology and Blood Transfusion, College of Medicine, Lagos State University, PMB 21266, Ikeja, Lagos, Lagos State, Nigeria
2. Oak Hospitals, 191 Lagos Road, Ikorodu, Lagos State, Nigeria
3. Department of Pathology and Forensic Medicine, College of Medicine, Lagos State University, PMB 21266, Ikeja, Lagos, Lagos State, Nigeria
4. Department of Haematology and Immunology, Ben Carson School of Medicine, Babcock University, Ilishan, Ogun State, Nigeria
5. Department of Haematology and Blood Transfusion, Faculty of Clinical Sciences, College of Medicine, University of Lagos, PMB 12003, Lagos State, Nigeria
6. Department of Medicine, College of Medicine, Lagos State University, PMB 21266, Ikeja, Lagos, Lagos State, Nigeria
7. Department of Medicine, University of Port Harcourt, PMB 5323, Choba, Port Harcourt 234, Rivers State, Nigeria