1. Department of Medicine and Surgery, University of Ilorin, Ilorin, Nigeria
2. Department of Medicine and Surgery, Obafemi Awolowo University, Ile-Ife, Nigeria
3. Department of Medicine and Surgery, University of Lagos, Lagos, Nigeria
4. Lagos State Health Services Commission, Lagos, Nigeria
5. Department of Medicine and Surgery, Ladoke Akintola University Teaching Hospital, Lagos, Nigeria.