1. Division of Medical Virology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town 7925, South Africa
2. Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town 7925, South Africa
3. International Centre for Genetic Engineering and Biotechnology, Observatory, Cape Town 7925, South Africa
4. Wellcome Trust Centre for Infectious Disease Research in Africa, University of Cape Town, Cape Town 7925, South Africa
5. Pathcare VetLab, Cape Town 7463, South Africa
6. Division of Medical Virology, Faculty of Medicine and Health Sciences, Stellenbosch University Tygerberg Campus, Cape Town 7505, South Africa
7. Biopharming Research Unit, Department of Molecular and Cell Biology, University of Cape Town, Cape Town 7701, South Africa
8. Department of Medical Biosciences, Faculty of Natural Sciences, University of the Western Cape, Bellville, Cape Town 7535, South Africa