1. Centre for Enteric Diseases, National Institute for Communicable Diseases (NICD), Johannesburg, South Africa
2. Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
3. Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
4. Clinical Infection, Microbiology & Immunology, Institute of Infection, Veterinary & Ecological Sciences (IVES), University of Liverpool, Liverpool, United Kingdom
5. Malawi Liverpool Wellcome Research Programme, Kamuzu University of Health Sciences, Blantyre, Malawi