1. South African Research Chair in Conservation Physiology, South African National Biodiversity Institute, Pretoria, South Africa
2. DSI-NRF Centre of Excellence, FitzPatrick Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
3. Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
4. Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
5. Mammal Research Institute and Endocrine Research Laboratory, University of Pretoria, Pretoria, South Africa