1. Department of Medical VirologyUniversity of PretoriaTshwane South Africa
2. National Health Laboratory Service—Tshwane Academic Division (NHLS—TAD)Tshwane South Africa
3. Toga LaboratoriesJohannesburg South Africa
4. Division of Intramural ResearchNational Institute of Allergy and Infectious Diseases, National Institutes of HealthBethesda Maryland
5. Johns Hopkins University School of MedicineBaltimore Maryland
6. Department of Internal Medicine, Division of Infectious DiseasesUniversity of PretoriaTshwane South Africa