1. Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, Nagoya, Japan
2. Department of Biomedical Sciences, College of Life and Health Science, Chubu University, Kasugai, Japan
3. Department of Basic Veterinary Science, United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
4. Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
5. National Institute for Environmental Studies, Ibaraki, Japan
6. Laboratory of Metabolism, National Cancer Institute, Bethesda, Maryland, USA