1. Department of Haematology and Blood Transfusion, College of Medicine, Lagos State University, Ikeja, Lagos, Nigeria.
2. Department of Haematology and Blood Transfusion, Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria.
3. Department of Haematology and Immunology, Ben Carson School of Medicine, Babcock University, Ilishan, Ogun State, Nigeria.
4. Department of Haematology and Blood Transfusion, Faculty of Clinical Sciences, College of Medicine, University of Lagos, Lagos, Nigeria.
5. Department of Medicine, College of Medicine, Lagos State University, Ikeja, Lagos, Nigeria.
6. Oak Hospitals, Ikorodu, Nigeria.
7. Department of Medicine, University of Port Harcourt, Port Harcourt, River State, Nigeria.