1. Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, N18 W9, Kita-ku, Sapporo 060–0818, Japan
2. Department of Pharmacology, Faculty of Veterinary Medicine, Kasetsart University, 50 Ngam Wong Wan Rd, Lat Yao Chatuchak, Bangkok 10900, Thailand
3. Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
4. Food Control Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt
5. Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, N18 W9, Kita-ku, Sapporo 060–0818, Japan