1. Department of Medicine, University of Ilorin Teaching Hospital, PMB 1459, Ilorin 240001, Nigeria
2. Department of Medicine, Ekiti State University Teaching Hospital, PMB 5355, Ado-Ekiti, Nigeria
3. Department of Medical Microbiology, University of Ilorin Teaching Hospital, PMB 1459, Ilorin 240001, Nigeria
4. Department of Anaesthesia, University of Ilorin Teaching Hospital, PMB 1459, Ilorin 240001, Nigeria