1. Department of Pharmaceutics and Pharmacy Practice, School of Pharmacy, University of Nairobi, Nairobi, Kenya
2. Department of Pharmacology and Pharmacognosy, School of Pharmacy, University of Nairobi, Kenya
3. Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
4. Division of Clinical Pharmacology, Karolinska Institute, Stockholm, Sweden
5. Health Economics Centre, Liverpool University Management School, Liverpool University, UK