1. Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
2. Food Control Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44510, Egypt
3. Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa