1. Departments of Medicine, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
2. Department of Medicine, University College Hospital, Ibadan, Oyo State, Nigeria
3. Department of Clinical Sciences, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
4. Department of Pharmacology and Therapeutics, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
5. Department of Health Policy and Management, College of Medicine, University of Ibadan, Ibadan, Oyo State, Nigeria
6. Department of Community Medicine, Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria