1. Department of Neurology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
2. Department of Life Science Research Center, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
3. Department of Gastroenterology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761‑0793, Japan
4. Department of Medical Engineering, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare, Kurashiki, Okayama 701‑0193, Japan
5. Department of Physiology 2, Kawasaki Medical School, Kurashiki, Okayama 701‑0192, Japan