1. Faculty of Human Health Sciences, Hachinohe University, Hachinohe, Japan
2. Department of Chemistry, Meisei University, Hino, Tokyo, Japan
3. Department of Human Ecology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
4. Laboratory of Pharmaceutical Health Sciences, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
5. Division of Nephrology, Endocrinology and Vascular Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
6. Biochemistry Section, National Institute for Minamata Disease, Minamata, Kumamoto, Japan