1. Department of Immunology, University of Toronto, Ontario, Canada
2. Kenyan AIDS Vaccine Initiative–Institute of Clinical Research, Nairobi, Kenya
3. Keenan Research Centre for Biomedical Science of St Michael’s Hospital, Toronto, Ontario, Canada
4. Department of Medical Microbiology, University of Nairobi, Kenya
5. Department of Medical Microbiology and Infectious Diseases, Rady College of Medicine, University of Manitoba, Winnipeg, Canada
6. Centre for the AIDS Programme of Research in South Africa, Durban
7. Section of Infectious Diseases, Department of Internal Medicine, Rady College of Medicine, University of Manitoba, Winnipeg, Canada