1. Department of Molecular Biology; Sapporo Medical University School of Medicine; Sapporo Japan
2. Department of Gastroenterology and Hepatology; Sapporo Medical University School of Medicine; Sapporo Japan
3. Digestive Disease Center; Akira Red Cross Hospital; Akita Japan
4. Department of Molecular Diagnostic Pathology; Iwate Medical University; Morioka Japan
5. Department of Dermatology; Sapporo Medical University School of Medicine; Sapporo Japan