1. Department of Pharmacology and Therapeutics, University of Ibadan, Ibadan, Nigeria.
2. Department of Clinical Pharmacology, University College Hospital, Ibadan, Nigeria.
3. Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria.
4. Department of Paediatrics, College of Medicine, University of Ibadan and University College Hospital, Ibadan, Nigeria.
5. Institute for Advanced Medical Research and Training, University of Ibadan, Ibadan, Nigeria.