1. Health Economics Unit, School of Public Health and Family Medicine, Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory, Cape Town 7925, South Africa
2. Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, 6200 MD Maastricht, The Netherlands
3. Western Cape Department: Health, Western Cape Province, P.O. Box 2060, Cape Town 8000, South Africa
4. College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala P.O. Box 7062, Uganda
5. Department of Environmental Health Science, Faculty of Health Sciences, National Open University of Nigeria, Abuja 901101, Nigeria
6. Business School, University of the People, 595 E Colorado Blvd Suite 623, Pasadena, CA 91101, USA
7. Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi GPS AK-448-4944, Ghana
8. DSI-NRF Centre of Excellence in Epidemiological Modelling and Analysis (SACEMA), Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa