1. Department of Molecular Pharmacology, Graduate School of Medical Sciences, Kitasato University, Sagamihara, Kanagawa 252-0374, Japan
2. Department of Pharmacology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
3. Department of Gastroenterology, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan