1. Benjamin S. Carson (Snr.) College of Medicine, Babcock University, Ilishan-Remo, Ogun State, Nigeria;
2. Ministry of Health, Ibadan, Oyo State, Nigeria;
3. College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria;
4. Department of Internal Medicine, Babcock University Teaching Hospital, Ilishan-Remo, Nigeria;
5. Department of Community Medicine, Babcock University Teaching Hospital, Ilishan-Remo, Ogun State, Nigeria
6. General Hospital, Odan, Lagos State, Nigeria;
7. University of Ilorin Teaching Hospital, Ilorin, Nigeria;
8. School of Public Health, University of South Wales, Rhondda Cynon Taff, United Kingdom;