Affiliation: | 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 Affiliate Investigator, Vitalant Research Institute, San Francisco, California, USA;3. Medical department, Collections department, IT department, South African National Blood Service (SANBS), Johannesburg, South Africa Translational Research Department, Medical Division, South African National Blood Service, Roodepoort, South Africa Division of Clinical Haematology, Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa Division of Clinical Haematology, University of the Free State, Bloemfontein, South Africa |