1. Department of Haematology and Blood Transfusion, College of Medicine, Lagos State University, Ikeja, PMB 21266, Lagos, Nigeria
2. Department of Haematology and Blood Transfusion, Faculty of Clinical Sciences, College of Medicine, University of Lagos, PMB 12003, Idiaraba, Lagos, Nigeria
3. Department of Haematology and Blood Transfusion, Lagos University Teaching Hospital, PMB 12003, Idiaraba, Lagos, Nigeria
4. Department of Medicine, College of Medicine, Lagos State University, Ikeja, PMB 1266, Lagos, Nigeria
5. Department of Community Health and Primary Health Care, College of Medicine, Lagos State University, Ikeja, PMB 21266, Lagos, Nigeria