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, Egypt
3. Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
4. Educational Animal Hospital, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44510, Egypt