1. Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
2. Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
3. Education and Research Center for Food Animal Health, Gifu University (GeFAH), Gifu 501-1193, Japan
4. The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
5. Joint Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan