1. Faculty of Veterinary ScienceDepartment of Companion Animal Clinical StudiesUniversity of Pretoria Pretoria South Africa
2. Research & Development–Regulatory Science–Human Safety–Residue AnalysisBayer Crop Science AG Monheim am Rhein Germany
3. Faculty of Veterinary ScienceOnderstepoort Veterinary Academic HospitalUniversity of Pretoria Pretoria South Africa
4. Faculty of Veterinary ScienceDepartment of Paraclinical ScienceUniversity of Pretoria Pretoria South Africa