1. TROPGAN, Department of Internal Medicine, University of Zambia School of Medicine, Lusaka, Zambia
2. Zambia National Blood Transfusion Service, University Teaching Hospital, Lusaka, Zambia
3. University of Alabama at Birmingham, Birmingham, Alabama, USA
4. Blood-Borne Virus Unit, Microbiology Services, Public Health England, Colindale, UK
5. Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
6. Department of Pathology and Microbiology, University Teaching Hospital, Lusaka, Zambia
7. Department of Hepatology, Imperial College London, London, UK