1. Division of Medical Virology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg Academic Hospital, Tygerberg, Cape Town, South Africa.
2. Africa Centre for Health and Population Studies, University of KwaZulu-Natal, Mtubatuba, South Africa.
3. Abbott Laboratories, Abbott Park, Illinois.
4. Quintiles Central Laboratories, Livingston, United Kingdom.
5. National Health Laboratory Services (NHLS), Western Cape Region, Tygerberg Hospital (Coastal), Cape Town, South Africa.