1. Division of Human Genetics, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
2. Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa.
3. Department of Immunology, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe.
4. Division of Medical Microbiology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
5. Department of Chemical Pathology, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe.
6. Institute of Clinical Medicine, University of Oslo and Women's Clinic, Rikshospitalet, University Hospital, Oslo, Norway.