1. Department of Pharmacy, School of Health Sciences, University of Zambia, Lusaka 10101, Zambia
2. Department of Public Health, Michael Chilufya Sata School of Medicine, Copperbelt University, Ndola 21692, Zambia
3. Clinical Research Department, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, Keppel Street, London WC1E 7HT, UK
4. Department of Clinical Pharmacy, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0208, South Africa
5. Department of Medicines Control, Zambia Medicines Regulatory Authority, Lusaka 31890, Zambia
6. Department of Pharmacology and Therapeutics, Ekiti State University College of Medicine, Ado-Ekiti 362103, Nigeria
7. Department of Medicine, Ekiti State University Teaching Hospital, Ado-Ekiti 362103, Nigeria
8. Department of Pharmaceutical Sciences, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0208, South Africa
9. Department of Public Health Pharmacy and Management, School of Pharmacy, Sefako Makgatho Health Sciences University, Pretoria 0208, South Africa
10. Department of Pharmacoepidemiology, Strathclyde Institute of Pharmacy and Biomedical Science, University of Strathclyde, Glasgow G4 0RE, UK
11. South African Vaccination and Immunisation Centre, Sefako Makgatho Health Sciences University, Molotlegi Street, Garankuwa, Pretoria 0208, South Africa