1. Laboratory of Toxicology, Graduate School of Veterinary Medicine; Hokkaido University; Sapporo Hokkaido Japan
2. Water Research Group, Unit for Environmental Sciences and Management; North-West University; Potchefstroom South Africa
3. Food Control Department, Faculty of Veterinary Medicine; Zagazig University; Zagazig Egypt
4. Department of Pharmacology, Faculty of Veterinary Medicine; Kasetsart University; Lat Yao Chatuchak Bangkok Thailand