1. Department of Paraclinical Sciences; Faculty of Veterinary Science; University of Pretoria; Onderstepoort South Africa
2. Council for Scientific and Industrial Research (CSIR); Natural Resources and the Environment; Pretoria South Africa
3. Stable Isotope Laboratory; Mammal Research Institute; Department of Zoology and Entomology; University of Pretoria; Pretoria South Africa
4. Department of Zoology and Entomology; University of Pretoria; Pretoria South Africa
5. Council for Scientific and Industrial Research (CSIR); Natural Resources and the Environment; Stellenbosch South Africa
6. U.S. Environmental Protection Agency; National Health and Environmental Effects Research Laboratory; Corvallis OR U.S.A
7. iThemba Laboratories; Johannesburg South Africa