1. Department of Internal Medicine, Division of Gastroenterology; Shinshu University School of Medicine; Matsumoto Japan
2. Department of Gastroenterology; Nagano Red Cross Hospital; Nagano Japan
3. Department of Surgery; Shinshu University School of Medicine; Matsumoto Japan
4. Department of Metabolic Regulation; Shinshu University Graduate School of Medicine; Matsumoto Japan
5. Department of Laboratory Medicine; Shinshu University Hospital; Matsumoto Japan
6. Digestive Disease Center; Showa Inan General Hospital; Komagane Japan
7. Department of Internal Medicine; Shironishi Hospital; Matsumoto Japan