1. Centre for Neuroendocrinology, University of Pretoria, Pretoria, South Africa
2. Department of Physiology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
3. Department of Immunology, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
4. MRC Centre for Reproductive Health, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
5. Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
6. Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa