1. Department of Microbiology and Immunology, Western University, London, Canada
2. Center for AIDS Research Uganda Laboratories, Joint Clinical Research Centre, Kampala, Uganda
3. Department of Pathology and Laboratory Medicine, Western University, London, Canada
4. Department of Applied Mathematics, Western University, London, Canada
5. Joint Clinical Research Centre, Kampala, Uganda
6. Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand