1. Department of Medicine and Surgery, University of Ilorin, Ilorin
2. Southern Illinois University Edwardsville, Edwardsville
3. College of Medicine, University of Nigeria, Nsukka
4. Department of Medicine and Surgery, Lagos State University College of Medicine, Lagos
5. Department of Medicine and Surgery, Olabisi Onabanjo University Teaching Hospital, Ogun
6. John H. Stroger Jr Hospital of Cook County, Chicago, IL
7. William Harvey Hospital, Kennington Rd, Willesborough, Ashford, Kent, UK
8. Department of Medicine and Surgery, Ladoke Akintola University Teaching Hospital, Ogbomoso, Nigeria