1. Department of Molecular Pathology, Graduate School of Medicine, Osaka Metropolitan University, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585, Japan
2. Department of Environmental Risk Assessment, Graduate School of Medicine, Osaka Metropolitan University, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585, Japan
3. Laboratory of Environmental Toxicology and Carcinogenesis, School of Pharmacy, Nihon University, Chiba 274-8555, Japan
4. Division of Cancer Pathophysiology, National Cancer Center Research Institute, Tokyo 104-0045, Japan
5. Department of Biochemistry, University of Yamanashi, Shimokato 1110, Chuo 409-3898, Japan