1. Medical department, Collections department, IT department South African National Blood Service (SANBS) Johannesburg South Africa
2. Departments of Laboratory Medicine and Epidemiology/Biostatistics University of California San Francisco San Francisco California USA
3. Affiliate Investigator Vitalant Research Institute San Francisco California USA
4. Translational Research Department, Medical Division South African National Blood Service Roodepoort South Africa
5. Division of Clinical Haematology, Department of Medicine, Faculty of Health Sciences University of Cape Town Cape Town South Africa
6. Division of Clinical Haematology University of the Free State Bloemfontein South Africa