1. Division of Medical Virology, Stellenbosch University, Cape Town, South Africa.
2. Department of Medical Microbiology, University of Zimbabwe, Harare, Zimbabwe.
3. Department of Psychology and Behavioral Neuroscience, University of Missouri–St Louis, University Boulevard, St Louis, Missouri, USA.
4. MRC Unit of Anxiety and Stress Disorders, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa.
5. MRC Unit of Anxiety and Stress Disorders, Department of Psychiatry, University of Stellenbosch, Cape Town, South Africa.
6. Division of Medical Microbiology, Stellenbosch University, Cape Town, South Africa.
7. National Health Laboratory Service (NHLS), Tygerberg Business Unity, Cape Town, South Africa.