1. Faculty of Pharmaceutical Sciences, University of Ilorin, Kwara State, Nigeria
2. Medicine and Surgery, Faculty of Clinical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
3. Faculty of Dentistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
4. Department of Public Health sciences, University of Calabar, Calabar, Nigeria
5. St. Paul's Hospital Millennium Medical College, Addis Ababa, Ethiopia
6. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, UK