1. Department of Medicine and Surgery, University of Ilorin, Ilorin, Nigeria
2. Department of Internal Medicine, Asokoro District Hospital, Abuja, Nigeria
3. Department of Medicine and Surgery, Lagos State Health Service Commission, Lagos, Nigeria
4. Department of Medicine and Surgery, Olabisi Onabanjo University, Ogun, Nigeria
5. Department of Medicine and Surgery, Babcock University Teaching Hospital, Ogun, Nigeria
6. Department of Medicine and Surgery, Afe Babalola University, Ado-ekiti, Ekiti, Nigeria
7. Department of Medicine and Surgery, Ladoke Akintola University of Technology, Ogbomoso, Nigeria.