1. Nasu Institute, Nisshin Flour Milling Co., Ltd., 1242 Iguchi, Nishinasuno, Nasu, Tochigi 329-2763, Japan
2. Animal Center for Biomedical Research, Faculty of Medicine, The University of Tokyo, 7?3?1 Hongo, Bunkyo, Tokyo 113-0033,, Japan
3. Division of Veterinary Pathology, Nippon Veterinary and Animal Science University, 1-7-1 Kyounan, Musashino, Tokyo 180-0023, Japan
4. Marupi Lifetech Co.Ltd., 103 Fushio, Ikeda, Osaka 563-0011, Japan
5. Toxicological Research Laboratories, Kyowa Hakko Kogyo Co.Ltd., 2548 Fujimagari, Ube, Yamaguchi 755-8501, Japan
6. Laboratory of Gene Structure I, Kazusa DNA Research Institute, 1532-3 Yana, Kisarazu, Chiba 292-0812, Japan
7. Biomedical Research Center, Osaka University Medical School, Suita 565-0871, Japan